/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:05:30,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:05:30,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:05:30,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:05:30,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:05:30,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:05:30,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:05:30,249 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 02:05:30,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:05:30,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:05:30,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:05:30,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:05:30,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:05:30,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:05:30,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:05:30,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:05:30,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:05:30,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:05:30,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:05:30,262 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:05:30,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:05:30,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:05:30,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:05:30,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:05:30,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:05:30,469 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:05:30,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c [2022-02-15 02:05:30,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52b4f8b3b/9d2ffdcb35ff4823b4bf41c27cc83b97/FLAG33195f89e [2022-02-15 02:05:30,879 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:05:30,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c [2022-02-15 02:05:30,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52b4f8b3b/9d2ffdcb35ff4823b4bf41c27cc83b97/FLAG33195f89e [2022-02-15 02:05:30,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52b4f8b3b/9d2ffdcb35ff4823b4bf41c27cc83b97 [2022-02-15 02:05:30,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:05:30,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:05:30,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:05:30,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:05:30,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:05:30,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:30" (1/1) ... [2022-02-15 02:05:30,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23fdda8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:30, skipping insertion in model container [2022-02-15 02:05:30,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:05:30" (1/1) ... [2022-02-15 02:05:30,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:05:30,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:05:31,063 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c[468,481] [2022-02-15 02:05:31,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:05:31,086 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:05:31,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c[468,481] [2022-02-15 02:05:31,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:05:31,120 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:05:31,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31 WrapperNode [2022-02-15 02:05:31,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:05:31,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:05:31,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:05:31,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:05:31,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:05:31,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:05:31,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:05:31,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:05:31,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (1/1) ... [2022-02-15 02:05:31,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:05:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:05:31,178 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 02:05:31,201 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 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:05:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:05:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:05:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:05:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:05:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:05:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 02:05:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:05:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:05:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:05:31,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:05:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:05:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:05:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:05:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:05:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:05:31,266 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:05:31,267 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:05:31,404 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:05:31,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:05:31,415 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 02:05:31,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:31 BoogieIcfgContainer [2022-02-15 02:05:31,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:05:31,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:05:31,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:05:31,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:05:31,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:05:30" (1/3) ... [2022-02-15 02:05:31,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eff063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:31, skipping insertion in model container [2022-02-15 02:05:31,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:05:31" (2/3) ... [2022-02-15 02:05:31,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eff063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:05:31, skipping insertion in model container [2022-02-15 02:05:31,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:05:31" (3/3) ... [2022-02-15 02:05:31,431 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2022-02-15 02:05:31,434 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:05:31,434 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:05:31,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:05:31,465 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 02:05:31,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:05:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 02:05:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 02:05:31,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:31,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:31,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:31,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138334, now seen corresponding path program 1 times [2022-02-15 02:05:31,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:31,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238899010] [2022-02-15 02:05:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:31,526 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:31,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:31,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238899010] [2022-02-15 02:05:31,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [238899010] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:31,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:31,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 02:05:31,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547327350] [2022-02-15 02:05:31,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:31,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 02:05:31,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 02:05:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:05:31,645 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:31,694 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-02-15 02:05:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 02:05:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-02-15 02:05:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:31,700 INFO L225 Difference]: With dead ends: 50 [2022-02-15 02:05:31,700 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 02:05:31,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 02:05:31,704 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:31,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:05:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 02:05:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-15 02:05:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-15 02:05:31,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-02-15 02:05:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-15 02:05:31,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-15 02:05:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 02:05:31,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:31,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:31,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:05:31,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash 677978447, now seen corresponding path program 1 times [2022-02-15 02:05:31,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:31,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498479793] [2022-02-15 02:05:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:31,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:31,733 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:31,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:31,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498479793] [2022-02-15 02:05:31,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [498479793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:31,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:31,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 02:05:31,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094375683] [2022-02-15 02:05:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 02:05:31,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:31,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 02:05:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:05:31,853 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:31,973 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-15 02:05:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:05:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-15 02:05:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:31,975 INFO L225 Difference]: With dead ends: 46 [2022-02-15 02:05:31,975 INFO L226 Difference]: Without dead ends: 31 [2022-02-15 02:05:31,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:05:31,980 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:31,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-15 02:05:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-02-15 02:05:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-02-15 02:05:31,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-02-15 02:05:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:31,991 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-02-15 02:05:31,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-02-15 02:05:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 02:05:31,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:31,992 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, 1, 1] [2022-02-15 02:05:31,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:05:31,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash -673447056, now seen corresponding path program 1 times [2022-02-15 02:05:31,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:31,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309145132] [2022-02-15 02:05:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:32,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:32,162 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:32,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:32,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309145132] [2022-02-15 02:05:32,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309145132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:32,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:32,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:05:32,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384736305] [2022-02-15 02:05:32,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:32,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:05:32,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:05:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:05:32,256 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:32,365 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2022-02-15 02:05:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:05:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-15 02:05:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:32,368 INFO L225 Difference]: With dead ends: 59 [2022-02-15 02:05:32,368 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 02:05:32,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:05:32,374 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:32,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 43 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 02:05:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-02-15 02:05:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-02-15 02:05:32,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 24 [2022-02-15 02:05:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-02-15 02:05:32,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-02-15 02:05:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 02:05:32,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:32,399 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, 1, 1] [2022-02-15 02:05:32,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:05:32,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 708533296, now seen corresponding path program 1 times [2022-02-15 02:05:32,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:32,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498197075] [2022-02-15 02:05:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:32,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:32,472 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:32,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:32,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498197075] [2022-02-15 02:05:32,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498197075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:32,561 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:32,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:05:32,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501608092] [2022-02-15 02:05:32,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:05:32,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:05:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:05:32,562 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:32,654 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-02-15 02:05:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:05:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-15 02:05:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:32,656 INFO L225 Difference]: With dead ends: 64 [2022-02-15 02:05:32,656 INFO L226 Difference]: Without dead ends: 41 [2022-02-15 02:05:32,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:05:32,667 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:32,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 55 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-15 02:05:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-02-15 02:05:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-15 02:05:32,673 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 24 [2022-02-15 02:05:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-15 02:05:32,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:05:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-15 02:05:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:05:32,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:32,674 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, 1, 1, 1] [2022-02-15 02:05:32,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:05:32,675 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2061972965, now seen corresponding path program 1 times [2022-02-15 02:05:32,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:32,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664524362] [2022-02-15 02:05:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:32,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:32,738 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:32,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:32,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664524362] [2022-02-15 02:05:32,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664524362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:32,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:32,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:05:32,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064240363] [2022-02-15 02:05:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:32,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:05:32,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:05:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:05:32,897 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:33,060 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-02-15 02:05:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:05:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:05:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:33,065 INFO L225 Difference]: With dead ends: 77 [2022-02-15 02:05:33,065 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 02:05:33,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:05:33,066 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:33,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 31 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 02:05:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-02-15 02:05:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 02:05:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-02-15 02:05:33,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 25 [2022-02-15 02:05:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:33,075 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-02-15 02:05:33,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-02-15 02:05:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:05:33,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:33,076 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, 1, 1, 1] [2022-02-15 02:05:33,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:05:33,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2060125923, now seen corresponding path program 1 times [2022-02-15 02:05:33,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:33,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813130993] [2022-02-15 02:05:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:33,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:33,124 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:33,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:33,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813130993] [2022-02-15 02:05:33,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [813130993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:33,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:33,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:05:33,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824874396] [2022-02-15 02:05:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:33,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:05:33,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:05:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:05:33,277 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:33,424 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-02-15 02:05:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:05:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:05:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:33,425 INFO L225 Difference]: With dead ends: 113 [2022-02-15 02:05:33,425 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 02:05:33,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:05:33,426 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:33,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 02:05:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-02-15 02:05:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 02:05:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-02-15 02:05:33,438 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 25 [2022-02-15 02:05:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:33,438 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-02-15 02:05:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-02-15 02:05:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:05:33,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:33,439 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, 1, 1, 1] [2022-02-15 02:05:33,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:05:33,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1425494747, now seen corresponding path program 1 times [2022-02-15 02:05:33,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:33,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010173820] [2022-02-15 02:05:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:33,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:33,484 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:33,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:33,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010173820] [2022-02-15 02:05:33,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010173820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:33,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:33,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:05:33,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739215414] [2022-02-15 02:05:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:33,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:05:33,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:05:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:05:33,748 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:33,987 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-02-15 02:05:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:05:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:05:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:33,988 INFO L225 Difference]: With dead ends: 88 [2022-02-15 02:05:33,988 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 02:05:33,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:33,989 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 02:05:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2022-02-15 02:05:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.28125) internal successors, (82), 65 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 02:05:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2022-02-15 02:05:34,000 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 25 [2022-02-15 02:05:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:34,001 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2022-02-15 02:05:34,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2022-02-15 02:05:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:05:34,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:34,001 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, 1, 1, 1] [2022-02-15 02:05:34,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:05:34,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2067453981, now seen corresponding path program 1 times [2022-02-15 02:05:34,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:34,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766245209] [2022-02-15 02:05:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:34,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:34,053 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:34,125 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:34,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766245209] [2022-02-15 02:05:34,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766245209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:34,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:34,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:05:34,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698190714] [2022-02-15 02:05:34,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:34,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:05:34,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:05:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:05:34,126 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:34,249 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-02-15 02:05:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:05:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:05:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:34,251 INFO L225 Difference]: With dead ends: 127 [2022-02-15 02:05:34,251 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 02:05:34,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:05:34,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:34,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 47 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 02:05:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-02-15 02:05:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 85 states have internal predecessors, (109), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 02:05:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-02-15 02:05:34,274 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 25 [2022-02-15 02:05:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:34,274 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-02-15 02:05:34,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-02-15 02:05:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:05:34,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:34,275 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, 1, 1, 1, 1, 1] [2022-02-15 02:05:34,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:05:34,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2069301023, now seen corresponding path program 1 times [2022-02-15 02:05:34,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:34,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861298391] [2022-02-15 02:05:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:34,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:34,335 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:34,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:34,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861298391] [2022-02-15 02:05:34,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861298391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:34,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:34,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:05:34,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778079651] [2022-02-15 02:05:34,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:34,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:05:34,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:05:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:05:34,581 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:34,862 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-02-15 02:05:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:05:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:05:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:34,863 INFO L225 Difference]: With dead ends: 121 [2022-02-15 02:05:34,863 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 02:05:34,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:34,864 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:34,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 60 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 02:05:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2022-02-15 02:05:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 98 states have internal predecessors, (123), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2022-02-15 02:05:34,876 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 25 [2022-02-15 02:05:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:34,876 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2022-02-15 02:05:34,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2022-02-15 02:05:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 02:05:34,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:34,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:34,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:05:34,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1643345404, now seen corresponding path program 1 times [2022-02-15 02:05:34,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:34,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904187010] [2022-02-15 02:05:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:34,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:34,916 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:34,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,007 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:35,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:35,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904187010] [2022-02-15 02:05:35,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [904187010] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:35,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:35,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:05:35,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330118305] [2022-02-15 02:05:35,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:35,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:05:35,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:05:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:05:35,342 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:35,589 INFO L93 Difference]: Finished difference Result 202 states and 263 transitions. [2022-02-15 02:05:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:05:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-02-15 02:05:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:35,590 INFO L225 Difference]: With dead ends: 202 [2022-02-15 02:05:35,590 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 02:05:35,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:05:35,591 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:35,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 64 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 02:05:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2022-02-15 02:05:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 100 states have (on average 1.29) internal successors, (129), 103 states have internal predecessors, (129), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 146 transitions. [2022-02-15 02:05:35,603 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 146 transitions. Word has length 28 [2022-02-15 02:05:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:35,603 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 146 transitions. [2022-02-15 02:05:35,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 146 transitions. [2022-02-15 02:05:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 02:05:35,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:35,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 02:05:35,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:05:35,604 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash -646101633, now seen corresponding path program 2 times [2022-02-15 02:05:35,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:35,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713130650] [2022-02-15 02:05:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:35,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:35,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,787 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:36,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:36,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713130650] [2022-02-15 02:05:36,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713130650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:36,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:36,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:05:36,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764381811] [2022-02-15 02:05:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:36,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:05:36,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:05:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:05:36,132 INFO L87 Difference]: Start difference. First operand 115 states and 146 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:36,336 INFO L93 Difference]: Finished difference Result 194 states and 252 transitions. [2022-02-15 02:05:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:05:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-02-15 02:05:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:36,337 INFO L225 Difference]: With dead ends: 194 [2022-02-15 02:05:36,337 INFO L226 Difference]: Without dead ends: 125 [2022-02-15 02:05:36,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:05:36,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:36,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-15 02:05:36,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2022-02-15 02:05:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 106 states have internal predecessors, (132), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-02-15 02:05:36,359 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 31 [2022-02-15 02:05:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-02-15 02:05:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-02-15 02:05:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 02:05:36,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:36,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 02:05:36,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:05:36,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1657218883, now seen corresponding path program 3 times [2022-02-15 02:05:36,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:36,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681582698] [2022-02-15 02:05:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:36,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:36,410 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:36,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:36,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:36,494 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:36,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:36,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:36,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681582698] [2022-02-15 02:05:36,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681582698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:36,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:36,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:05:36,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326693493] [2022-02-15 02:05:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:36,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:05:36,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:05:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:05:36,843 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:37,076 INFO L93 Difference]: Finished difference Result 210 states and 272 transitions. [2022-02-15 02:05:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:05:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-02-15 02:05:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:37,077 INFO L225 Difference]: With dead ends: 210 [2022-02-15 02:05:37,077 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 02:05:37,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:37,078 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:37,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 60 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 02:05:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2022-02-15 02:05:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 106 states have (on average 1.2830188679245282) internal successors, (136), 109 states have internal predecessors, (136), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-02-15 02:05:37,089 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2022-02-15 02:05:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:37,090 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-02-15 02:05:37,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-02-15 02:05:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:05:37,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:37,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 02:05:37,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:05:37,090 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1482120420, now seen corresponding path program 4 times [2022-02-15 02:05:37,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:37,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587444263] [2022-02-15 02:05:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:37,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,165 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:37,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:37,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:37,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:37,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:37,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587444263] [2022-02-15 02:05:37,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [587444263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:37,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:37,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:05:37,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9153979] [2022-02-15 02:05:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:05:37,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:05:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:05:37,686 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:37,885 INFO L93 Difference]: Finished difference Result 201 states and 260 transitions. [2022-02-15 02:05:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:05:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-02-15 02:05:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:37,886 INFO L225 Difference]: With dead ends: 201 [2022-02-15 02:05:37,886 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 02:05:37,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:37,887 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:37,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 02:05:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-15 02:05:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.275229357798165) internal successors, (139), 112 states have internal predecessors, (139), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-15 02:05:37,898 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 34 [2022-02-15 02:05:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:37,899 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-15 02:05:37,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-15 02:05:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:05:37,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:37,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:37,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:05:37,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1224498974, now seen corresponding path program 5 times [2022-02-15 02:05:37,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:37,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909445588] [2022-02-15 02:05:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:37,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,987 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:38,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,066 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:38,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:38,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:38,480 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:38,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909445588] [2022-02-15 02:05:38,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909445588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:38,480 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:38,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:05:38,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001826525] [2022-02-15 02:05:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:05:38,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:05:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:05:38,481 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:38,770 INFO L93 Difference]: Finished difference Result 205 states and 264 transitions. [2022-02-15 02:05:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:05:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-02-15 02:05:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:38,771 INFO L225 Difference]: With dead ends: 205 [2022-02-15 02:05:38,771 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 02:05:38,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:05:38,772 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:38,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 02:05:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2022-02-15 02:05:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.275229357798165) internal successors, (139), 112 states have internal predecessors, (139), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-15 02:05:38,784 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 34 [2022-02-15 02:05:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:38,785 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-15 02:05:38,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-15 02:05:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:05:38,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:38,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 02:05:38,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:05:38,785 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash 213381724, now seen corresponding path program 6 times [2022-02-15 02:05:38,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:38,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416553109] [2022-02-15 02:05:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:38,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,832 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:38,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,930 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:39,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:39,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416553109] [2022-02-15 02:05:39,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416553109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:39,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:39,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:05:39,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388218051] [2022-02-15 02:05:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:05:39,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:05:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:39,343 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:39,562 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2022-02-15 02:05:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:05:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-02-15 02:05:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:39,565 INFO L225 Difference]: With dead ends: 216 [2022-02-15 02:05:39,565 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 02:05:39,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:39,566 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:39,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 62 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 02:05:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2022-02-15 02:05:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 115 states have internal predecessors, (143), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-02-15 02:05:39,579 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 34 [2022-02-15 02:05:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-02-15 02:05:39,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-02-15 02:05:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:05:39,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:39,580 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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 02:05:39,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:05:39,580 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash -802454433, now seen corresponding path program 7 times [2022-02-15 02:05:39,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:39,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414378904] [2022-02-15 02:05:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:39,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:39,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:39,662 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:39,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:39,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:39,754 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:40,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:40,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414378904] [2022-02-15 02:05:40,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [414378904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:40,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:40,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:05:40,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739211565] [2022-02-15 02:05:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:05:40,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:05:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:05:40,225 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:40,469 INFO L93 Difference]: Finished difference Result 210 states and 270 transitions. [2022-02-15 02:05:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:05:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-02-15 02:05:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:40,473 INFO L225 Difference]: With dead ends: 210 [2022-02-15 02:05:40,473 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 02:05:40,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:05:40,474 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:40,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 02:05:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 130. [2022-02-15 02:05:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.2695652173913043) internal successors, (146), 118 states have internal predecessors, (146), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-02-15 02:05:40,488 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 37 [2022-02-15 02:05:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:40,488 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-02-15 02:05:40,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-02-15 02:05:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:05:40,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:40,488 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 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 02:05:40,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:05:40,489 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1620102883, now seen corresponding path program 8 times [2022-02-15 02:05:40,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:40,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730653609] [2022-02-15 02:05:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:40,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,578 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:40,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,673 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:41,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:41,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730653609] [2022-02-15 02:05:41,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730653609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:41,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:41,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:05:41,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111911965] [2022-02-15 02:05:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:41,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:05:41,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:05:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:41,136 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:41,419 INFO L93 Difference]: Finished difference Result 213 states and 273 transitions. [2022-02-15 02:05:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:05:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-02-15 02:05:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:41,421 INFO L225 Difference]: With dead ends: 213 [2022-02-15 02:05:41,422 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 02:05:41,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:41,422 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:41,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 61 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 02:05:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2022-02-15 02:05:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.2695652173913043) internal successors, (146), 118 states have internal predecessors, (146), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-02-15 02:05:41,439 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 37 [2022-02-15 02:05:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:41,440 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-02-15 02:05:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-02-15 02:05:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:05:41,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:41,440 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 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 02:05:41,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:05:41,440 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1086516511, now seen corresponding path program 9 times [2022-02-15 02:05:41,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:41,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273957587] [2022-02-15 02:05:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:41,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,540 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:41,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,620 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:42,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:42,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273957587] [2022-02-15 02:05:42,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [273957587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:42,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:42,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:05:42,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421570029] [2022-02-15 02:05:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:42,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:05:42,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:05:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:05:42,081 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:42,345 INFO L93 Difference]: Finished difference Result 211 states and 271 transitions. [2022-02-15 02:05:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:05:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-02-15 02:05:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:42,346 INFO L225 Difference]: With dead ends: 211 [2022-02-15 02:05:42,346 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 02:05:42,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:42,347 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:42,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 02:05:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2022-02-15 02:05:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.2695652173913043) internal successors, (146), 118 states have internal predecessors, (146), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-02-15 02:05:42,377 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 37 [2022-02-15 02:05:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:42,377 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-02-15 02:05:42,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-02-15 02:05:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:05:42,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:42,377 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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 02:05:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:05:42,377 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 75399261, now seen corresponding path program 10 times [2022-02-15 02:05:42,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:42,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115482343] [2022-02-15 02:05:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:42,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:42,408 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:42,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:42,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:42,505 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:42,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:42,932 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:42,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115482343] [2022-02-15 02:05:42,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [115482343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:42,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:42,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:05:42,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109633765] [2022-02-15 02:05:42,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:42,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:05:42,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:05:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:42,933 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:43,222 INFO L93 Difference]: Finished difference Result 222 states and 286 transitions. [2022-02-15 02:05:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:05:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-02-15 02:05:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:43,223 INFO L225 Difference]: With dead ends: 222 [2022-02-15 02:05:43,223 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 02:05:43,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:43,224 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:43,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 62 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 02:05:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2022-02-15 02:05:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.271186440677966) internal successors, (150), 121 states have internal predecessors, (150), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-02-15 02:05:43,244 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 37 [2022-02-15 02:05:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:43,245 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-02-15 02:05:43,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-02-15 02:05:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:05:43,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:43,245 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 02:05:43,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:05:43,245 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1742651763, now seen corresponding path program 1 times [2022-02-15 02:05:43,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:43,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210512763] [2022-02-15 02:05:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:43,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,434 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:43,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:43,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:43,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210512763] [2022-02-15 02:05:43,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210512763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:43,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:43,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:05:43,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598235927] [2022-02-15 02:05:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:05:43,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:05:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:05:43,519 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:43,593 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2022-02-15 02:05:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:05:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-02-15 02:05:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:43,594 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:05:43,594 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 02:05:43,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:05:43,595 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:43,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 25 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:05:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 02:05:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-02-15 02:05:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.2424242424242424) internal successors, (164), 135 states have internal predecessors, (164), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2022-02-15 02:05:43,620 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 39 [2022-02-15 02:05:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:43,620 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2022-02-15 02:05:43,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2022-02-15 02:05:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:05:43,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:43,620 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 02:05:43,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:05:43,621 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash 651130940, now seen corresponding path program 11 times [2022-02-15 02:05:43,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:43,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287627890] [2022-02-15 02:05:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:43,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:43,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,810 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:43,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:44,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:44,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287627890] [2022-02-15 02:05:44,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [287627890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:44,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:44,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:05:44,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573250252] [2022-02-15 02:05:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:44,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:05:44,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:05:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:05:44,294 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:44,572 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2022-02-15 02:05:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:05:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:05:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:44,573 INFO L225 Difference]: With dead ends: 245 [2022-02-15 02:05:44,573 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 02:05:44,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:44,575 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:44,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 56 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 02:05:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-02-15 02:05:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.237037037037037) internal successors, (167), 138 states have internal predecessors, (167), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-02-15 02:05:44,596 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 40 [2022-02-15 02:05:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:44,596 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-02-15 02:05:44,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-02-15 02:05:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:05:44,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:44,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 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 02:05:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:05:44,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1154307394, now seen corresponding path program 12 times [2022-02-15 02:05:44,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:44,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177871396] [2022-02-15 02:05:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:44,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:44,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:44,693 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:44,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:44,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:44,770 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:44,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:44,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:45,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:45,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177871396] [2022-02-15 02:05:45,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177871396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:45,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:45,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:05:45,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135829177] [2022-02-15 02:05:45,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:45,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:05:45,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:05:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:05:45,275 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:45,564 INFO L93 Difference]: Finished difference Result 248 states and 309 transitions. [2022-02-15 02:05:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:05:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:05:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:45,572 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:05:45,572 INFO L226 Difference]: Without dead ends: 167 [2022-02-15 02:05:45,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:45,573 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:45,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 60 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-15 02:05:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-02-15 02:05:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.237037037037037) internal successors, (167), 138 states have internal predecessors, (167), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-02-15 02:05:45,590 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 40 [2022-02-15 02:05:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:45,591 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-02-15 02:05:45,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-02-15 02:05:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:05:45,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:45,591 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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 02:05:45,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:05:45,591 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1971955844, now seen corresponding path program 13 times [2022-02-15 02:05:45,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:45,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262523996] [2022-02-15 02:05:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:45,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,667 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:45,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:45,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:46,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:46,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262523996] [2022-02-15 02:05:46,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [262523996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:46,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:46,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:05:46,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164483441] [2022-02-15 02:05:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:46,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:05:46,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:05:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:46,263 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:46,568 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2022-02-15 02:05:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:05:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:05:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:46,569 INFO L225 Difference]: With dead ends: 245 [2022-02-15 02:05:46,569 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 02:05:46,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:46,570 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:46,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 02:05:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-02-15 02:05:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.237037037037037) internal successors, (167), 138 states have internal predecessors, (167), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-02-15 02:05:46,591 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 40 [2022-02-15 02:05:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:46,591 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-02-15 02:05:46,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-02-15 02:05:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:05:46,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:46,591 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 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 02:05:46,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:05:46,592 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 734663550, now seen corresponding path program 14 times [2022-02-15 02:05:46,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:46,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392453463] [2022-02-15 02:05:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:46,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:46,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:46,690 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:46,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:46,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:46,762 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:47,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:47,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392453463] [2022-02-15 02:05:47,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392453463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:47,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:47,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:05:47,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163630570] [2022-02-15 02:05:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:47,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:05:47,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:05:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:47,239 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:47,563 INFO L93 Difference]: Finished difference Result 243 states and 304 transitions. [2022-02-15 02:05:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:05:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:05:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:47,565 INFO L225 Difference]: With dead ends: 243 [2022-02-15 02:05:47,565 INFO L226 Difference]: Without dead ends: 162 [2022-02-15 02:05:47,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:05:47,566 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:47,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 62 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-15 02:05:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2022-02-15 02:05:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.237037037037037) internal successors, (167), 138 states have internal predecessors, (167), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-02-15 02:05:47,585 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 40 [2022-02-15 02:05:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:47,585 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-02-15 02:05:47,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-02-15 02:05:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:05:47,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:47,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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 02:05:47,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:05:47,586 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -276453700, now seen corresponding path program 15 times [2022-02-15 02:05:47,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:47,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455829924] [2022-02-15 02:05:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:47,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:47,639 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:47,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:47,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:47,732 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:47,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:47,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:47,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:48,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:48,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455829924] [2022-02-15 02:05:48,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [455829924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:48,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:48,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:05:48,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703006312] [2022-02-15 02:05:48,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:48,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:05:48,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:05:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:48,248 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:48,581 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2022-02-15 02:05:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:05:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:05:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:48,586 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:05:48,586 INFO L226 Difference]: Without dead ends: 162 [2022-02-15 02:05:48,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:05:48,587 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:48,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-15 02:05:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 153. [2022-02-15 02:05:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 138 states have (on average 1.2391304347826086) internal successors, (171), 141 states have internal predecessors, (171), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 188 transitions. [2022-02-15 02:05:48,613 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 188 transitions. Word has length 40 [2022-02-15 02:05:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:48,614 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 188 transitions. [2022-02-15 02:05:48,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 22 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2022-02-15 02:05:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:48,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:48,615 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 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 02:05:48,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:05:48,615 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1742267585, now seen corresponding path program 16 times [2022-02-15 02:05:48,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:48,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851426064] [2022-02-15 02:05:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:48,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,723 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:48,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,825 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:48,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:48,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:49,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851426064] [2022-02-15 02:05:49,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851426064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:49,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:49,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:05:49,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900981716] [2022-02-15 02:05:49,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:49,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:05:49,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:05:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:05:49,340 INFO L87 Difference]: Start difference. First operand 153 states and 188 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:49,592 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2022-02-15 02:05:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:05:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:49,593 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:05:49,593 INFO L226 Difference]: Without dead ends: 173 [2022-02-15 02:05:49,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:49,598 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:49,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-15 02:05:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-02-15 02:05:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 144 states have internal predecessors, (174), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-02-15 02:05:49,620 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 43 [2022-02-15 02:05:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-02-15 02:05:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-02-15 02:05:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:49,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:49,621 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 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 02:05:49,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:05:49,621 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1680227971, now seen corresponding path program 17 times [2022-02-15 02:05:49,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:49,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231465929] [2022-02-15 02:05:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:49,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:49,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:49,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:49,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:49,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:49,802 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:50,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:50,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231465929] [2022-02-15 02:05:50,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [231465929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:50,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:50,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:05:50,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552145595] [2022-02-15 02:05:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:05:50,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:05:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:50,338 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:50,696 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-02-15 02:05:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:05:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:50,697 INFO L225 Difference]: With dead ends: 257 [2022-02-15 02:05:50,697 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 02:05:50,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:50,698 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:50,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 62 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 02:05:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2022-02-15 02:05:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 144 states have internal predecessors, (174), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-02-15 02:05:50,721 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 43 [2022-02-15 02:05:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-02-15 02:05:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-02-15 02:05:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:50,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:50,721 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 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 02:05:50,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:05:50,722 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 809300991, now seen corresponding path program 18 times [2022-02-15 02:05:50,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:50,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158047200] [2022-02-15 02:05:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:50,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:50,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:50,807 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:50,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:50,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:50,890 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:50,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:51,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:51,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158047200] [2022-02-15 02:05:51,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [158047200] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:51,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:51,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:05:51,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350995825] [2022-02-15 02:05:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:51,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:05:51,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:05:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:51,421 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:51,779 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2022-02-15 02:05:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:05:51,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:51,781 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:05:51,781 INFO L226 Difference]: Without dead ends: 173 [2022-02-15 02:05:51,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:05:51,782 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:51,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-15 02:05:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-02-15 02:05:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 144 states have internal predecessors, (174), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-02-15 02:05:51,808 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 43 [2022-02-15 02:05:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-02-15 02:05:51,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-02-15 02:05:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:51,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:51,809 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 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 02:05:51,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:05:51,809 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:51,810 INFO L85 PathProgramCache]: Analyzing trace with hash -8347459, now seen corresponding path program 19 times [2022-02-15 02:05:51,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:51,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870480179] [2022-02-15 02:05:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:51,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:51,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:51,894 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:51,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:51,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:51,968 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:52,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:52,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870480179] [2022-02-15 02:05:52,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870480179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:52,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:52,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:05:52,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864157956] [2022-02-15 02:05:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:52,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:05:52,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:05:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:52,558 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:52,892 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-02-15 02:05:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:05:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:52,904 INFO L225 Difference]: With dead ends: 251 [2022-02-15 02:05:52,904 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 02:05:52,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:05:52,904 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 02:05:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 156. [2022-02-15 02:05:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 144 states have internal predecessors, (174), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-02-15 02:05:52,928 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 43 [2022-02-15 02:05:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:52,928 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-02-15 02:05:52,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-02-15 02:05:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:52,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:52,929 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 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 02:05:52,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:05:52,929 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1596695361, now seen corresponding path program 20 times [2022-02-15 02:05:52,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:52,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613519817] [2022-02-15 02:05:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:52,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:53,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:53,014 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:53,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:53,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:53,089 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:53,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:53,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:53,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613519817] [2022-02-15 02:05:53,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [613519817] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:53,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:53,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:05:53,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124106637] [2022-02-15 02:05:53,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:53,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:05:53,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:05:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:05:53,665 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:53,995 INFO L93 Difference]: Finished difference Result 249 states and 311 transitions. [2022-02-15 02:05:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:05:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:53,996 INFO L225 Difference]: With dead ends: 249 [2022-02-15 02:05:53,996 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 02:05:53,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:05:53,997 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:53,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 64 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 02:05:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2022-02-15 02:05:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 144 states have internal predecessors, (174), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-02-15 02:05:54,021 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 43 [2022-02-15 02:05:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:54,021 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-02-15 02:05:54,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-02-15 02:05:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:05:54,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:54,022 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 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 02:05:54,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:05:54,022 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1687154685, now seen corresponding path program 21 times [2022-02-15 02:05:54,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:54,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614390621] [2022-02-15 02:05:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:54,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:54,063 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:54,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:54,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:54,138 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:54,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:54,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614390621] [2022-02-15 02:05:54,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [614390621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:54,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:54,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:05:54,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399048118] [2022-02-15 02:05:54,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:54,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:05:54,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:05:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:05:54,728 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:55,060 INFO L93 Difference]: Finished difference Result 260 states and 326 transitions. [2022-02-15 02:05:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:05:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:05:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:55,061 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:05:55,061 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 02:05:55,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:05:55,062 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:55,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 67 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 02:05:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2022-02-15 02:05:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 147 states have internal predecessors, (178), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 195 transitions. [2022-02-15 02:05:55,087 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 195 transitions. Word has length 43 [2022-02-15 02:05:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:55,087 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 195 transitions. [2022-02-15 02:05:55,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 195 transitions. [2022-02-15 02:05:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 02:05:55,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:55,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-02-15 02:05:55,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:05:55,088 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2117823645, now seen corresponding path program 2 times [2022-02-15 02:05:55,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:55,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936331045] [2022-02-15 02:05:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:55,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,237 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:55,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:55,327 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:55,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936331045] [2022-02-15 02:05:55,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936331045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:55,327 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:55,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:05:55,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044114334] [2022-02-15 02:05:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:55,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:05:55,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:05:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:05:55,328 INFO L87 Difference]: Start difference. First operand 159 states and 195 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:55,472 INFO L93 Difference]: Finished difference Result 296 states and 372 transitions. [2022-02-15 02:05:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:05:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-02-15 02:05:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:55,473 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:05:55,473 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 02:05:55,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:05:55,474 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:55,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 27 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:05:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 02:05:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 184. [2022-02-15 02:05:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 169 states have (on average 1.2189349112426036) internal successors, (206), 172 states have internal predecessors, (206), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2022-02-15 02:05:55,503 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 45 [2022-02-15 02:05:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2022-02-15 02:05:55,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2022-02-15 02:05:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:05:55,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:55,504 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 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 02:05:55,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:05:55,504 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1569322332, now seen corresponding path program 22 times [2022-02-15 02:05:55,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:55,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471883452] [2022-02-15 02:05:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:55,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,586 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:55,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:55,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:56,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:56,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471883452] [2022-02-15 02:05:56,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471883452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:56,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:56,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:05:56,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982467248] [2022-02-15 02:05:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:56,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:05:56,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:05:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:05:56,253 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:56,540 INFO L93 Difference]: Finished difference Result 314 states and 383 transitions. [2022-02-15 02:05:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:05:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:05:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:56,541 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:05:56,541 INFO L226 Difference]: Without dead ends: 209 [2022-02-15 02:05:56,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:56,542 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:56,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 56 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-15 02:05:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 187. [2022-02-15 02:05:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:05:56,573 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:05:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:56,573 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:05:56,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:05:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:05:56,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:56,574 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 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 02:05:56,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:05:56,574 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1339441570, now seen corresponding path program 23 times [2022-02-15 02:05:56,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:56,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75001710] [2022-02-15 02:05:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:56,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,640 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:56,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,722 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:57,308 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:57,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75001710] [2022-02-15 02:05:57,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [75001710] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:57,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:57,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:05:57,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298403473] [2022-02-15 02:05:57,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:57,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:05:57,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:05:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:05:57,309 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:57,699 INFO L93 Difference]: Finished difference Result 317 states and 386 transitions. [2022-02-15 02:05:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:05:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:05:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:57,700 INFO L225 Difference]: With dead ends: 317 [2022-02-15 02:05:57,701 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 02:05:57,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:05:57,701 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:57,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 67 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 02:05:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2022-02-15 02:05:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:05:57,735 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:05:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:57,735 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:05:57,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:05:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:05:57,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:57,736 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 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 02:05:57,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:05:57,736 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1277401956, now seen corresponding path program 24 times [2022-02-15 02:05:57,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:57,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620767453] [2022-02-15 02:05:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:57,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:57,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:57,819 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:57,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:57,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:57,895 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:57,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:58,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:58,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:58,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620767453] [2022-02-15 02:05:58,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [620767453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:58,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:58,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:05:58,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117004830] [2022-02-15 02:05:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:58,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:05:58,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:05:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:05:58,521 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:58,935 INFO L93 Difference]: Finished difference Result 314 states and 383 transitions. [2022-02-15 02:05:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:05:58,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:05:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:58,936 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:05:58,936 INFO L226 Difference]: Without dead ends: 209 [2022-02-15 02:05:58,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:05:58,937 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:58,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 70 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-15 02:05:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 187. [2022-02-15 02:05:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:05:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:05:58,982 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:05:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:58,982 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:05:58,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 22 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:05:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:05:58,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:58,983 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 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 02:05:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:05:58,983 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1212127006, now seen corresponding path program 25 times [2022-02-15 02:05:58,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:58,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144802598] [2022-02-15 02:05:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:59,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,059 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:59,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,163 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:59,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:05:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:59,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:59,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144802598] [2022-02-15 02:05:59,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144802598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:59,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:59,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:05:59,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915037123] [2022-02-15 02:05:59,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:05:59,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:05:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:05:59,743 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:00,128 INFO L93 Difference]: Finished difference Result 311 states and 380 transitions. [2022-02-15 02:06:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:06:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:06:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:00,129 INFO L225 Difference]: With dead ends: 311 [2022-02-15 02:06:00,129 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 02:06:00,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:00,129 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:00,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 72 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 02:06:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-02-15 02:06:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:06:00,164 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:06:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:00,164 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:06:00,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:06:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:06:00,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:00,164 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 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 02:06:00,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:06:00,164 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash 394478556, now seen corresponding path program 26 times [2022-02-15 02:06:00,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:00,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126902389] [2022-02-15 02:06:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:00,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:00,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:00,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:00,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:00,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:00,316 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:00,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:00,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126902389] [2022-02-15 02:06:00,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126902389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:00,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:00,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:06:00,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284650526] [2022-02-15 02:06:00,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:00,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:06:00,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:06:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:00,942 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:01,291 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2022-02-15 02:06:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:06:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:06:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:01,293 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:06:01,293 INFO L226 Difference]: Without dead ends: 203 [2022-02-15 02:06:01,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:01,294 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:01,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-15 02:06:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 187. [2022-02-15 02:06:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:06:01,329 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:06:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:01,329 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:06:01,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:06:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:06:01,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:01,329 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 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 02:06:01,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:06:01,330 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1193869346, now seen corresponding path program 27 times [2022-02-15 02:06:01,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:01,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926665579] [2022-02-15 02:06:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:01,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,425 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:01,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:02,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:02,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926665579] [2022-02-15 02:06:02,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [926665579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:02,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:02,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:06:02,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353525054] [2022-02-15 02:06:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:02,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:06:02,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:06:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:02,122 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:02,508 INFO L93 Difference]: Finished difference Result 306 states and 375 transitions. [2022-02-15 02:06:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:06:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:06:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:02,509 INFO L225 Difference]: With dead ends: 306 [2022-02-15 02:06:02,509 INFO L226 Difference]: Without dead ends: 201 [2022-02-15 02:06:02,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:02,510 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:02,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 68 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-15 02:06:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2022-02-15 02:06:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 175 states have internal predecessors, (209), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2022-02-15 02:06:02,550 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 46 [2022-02-15 02:06:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:02,550 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2022-02-15 02:06:02,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2022-02-15 02:06:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:06:02,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:02,550 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 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 02:06:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:06:02,551 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2089980700, now seen corresponding path program 28 times [2022-02-15 02:06:02,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:02,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132278885] [2022-02-15 02:06:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:02,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:02,582 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:02,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:02,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:02,654 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:03,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:03,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132278885] [2022-02-15 02:06:03,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132278885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:03,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:03,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:06:03,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342011541] [2022-02-15 02:06:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:03,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:06:03,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:06:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:03,288 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:03,770 INFO L93 Difference]: Finished difference Result 317 states and 390 transitions. [2022-02-15 02:06:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:06:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:06:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:03,771 INFO L225 Difference]: With dead ends: 317 [2022-02-15 02:06:03,771 INFO L226 Difference]: Without dead ends: 201 [2022-02-15 02:06:03,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:03,772 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:03,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-15 02:06:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 190. [2022-02-15 02:06:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 175 states have (on average 1.217142857142857) internal successors, (213), 178 states have internal predecessors, (213), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 230 transitions. [2022-02-15 02:06:03,807 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 230 transitions. Word has length 46 [2022-02-15 02:06:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:03,807 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 230 transitions. [2022-02-15 02:06:03,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 230 transitions. [2022-02-15 02:06:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:03,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:03,808 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 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 02:06:03,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:06:03,808 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1745750559, now seen corresponding path program 29 times [2022-02-15 02:06:03,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:03,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313254546] [2022-02-15 02:06:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:03,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:03,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:03,892 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:03,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:03,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:03,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:04,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:04,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:04,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313254546] [2022-02-15 02:06:04,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313254546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:04,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:04,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:06:04,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573829129] [2022-02-15 02:06:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:04,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:06:04,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:06:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:06:04,595 INFO L87 Difference]: Start difference. First operand 190 states and 230 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:05,033 INFO L93 Difference]: Finished difference Result 323 states and 393 transitions. [2022-02-15 02:06:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:06:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:05,034 INFO L225 Difference]: With dead ends: 323 [2022-02-15 02:06:05,034 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:06:05,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:06:05,035 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:05,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:06:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2022-02-15 02:06:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:05,081 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:05,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:05,081 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 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 02:06:05,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:06:05,082 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2020510173, now seen corresponding path program 30 times [2022-02-15 02:06:05,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:05,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425253258] [2022-02-15 02:06:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:05,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:05,181 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:05,181 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:05,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:05,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:05,261 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:05,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:05,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425253258] [2022-02-15 02:06:05,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425253258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:05,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:05,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:06:05,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960716991] [2022-02-15 02:06:05,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:06:05,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:06:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:06:05,895 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:06,365 INFO L93 Difference]: Finished difference Result 326 states and 396 transitions. [2022-02-15 02:06:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:06:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:06,366 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:06:06,366 INFO L226 Difference]: Without dead ends: 221 [2022-02-15 02:06:06,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:06,367 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:06,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 75 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-15 02:06:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2022-02-15 02:06:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:06,412 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:06,413 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:06,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:06,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:06,414 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 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 02:06:06,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:06:06,414 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash -888253729, now seen corresponding path program 31 times [2022-02-15 02:06:06,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:06,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059833318] [2022-02-15 02:06:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:06,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:06,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:06,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:06,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:06,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:06,605 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:06,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:06,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:07,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:07,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059833318] [2022-02-15 02:06:07,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1059833318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:07,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:07,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:06:07,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247371385] [2022-02-15 02:06:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:07,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:06:07,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:06:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:06:07,232 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:07,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:07,601 INFO L93 Difference]: Finished difference Result 323 states and 393 transitions. [2022-02-15 02:06:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:06:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:07,602 INFO L225 Difference]: With dead ends: 323 [2022-02-15 02:06:07,602 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:06:07,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:07,602 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:07,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 58 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:06:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2022-02-15 02:06:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:07,657 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:07,657 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:07,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:07,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:07,658 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 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 02:06:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:06:07,658 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash -826214115, now seen corresponding path program 32 times [2022-02-15 02:06:07,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:07,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287925998] [2022-02-15 02:06:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:07,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:07,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:07,734 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:07,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:07,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:07,810 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:07,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:07,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:08,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:08,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287925998] [2022-02-15 02:06:08,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287925998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:08,439 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:08,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:06:08,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746132051] [2022-02-15 02:06:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:08,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:06:08,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:06:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:08,440 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:08,879 INFO L93 Difference]: Finished difference Result 320 states and 390 transitions. [2022-02-15 02:06:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:06:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:08,880 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:06:08,880 INFO L226 Difference]: Without dead ends: 215 [2022-02-15 02:06:08,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:08,881 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:08,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 71 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-15 02:06:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 193. [2022-02-15 02:06:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:08,927 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:08,927 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:08,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:08,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:08,928 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 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 02:06:08,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:06:08,928 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1663314847, now seen corresponding path program 33 times [2022-02-15 02:06:08,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:08,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158066036] [2022-02-15 02:06:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:08,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:09,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:09,015 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:09,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:09,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:09,103 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:09,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:09,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:09,740 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:09,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158066036] [2022-02-15 02:06:09,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158066036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:09,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:09,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:06:09,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430500961] [2022-02-15 02:06:09,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:09,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:06:09,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:06:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:09,741 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:10,267 INFO L93 Difference]: Finished difference Result 317 states and 387 transitions. [2022-02-15 02:06:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:06:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:10,268 INFO L225 Difference]: With dead ends: 317 [2022-02-15 02:06:10,268 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 02:06:10,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:10,269 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 74 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 02:06:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 193. [2022-02-15 02:06:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:10,317 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:10,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:10,318 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 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 02:06:10,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:06:10,318 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 845666397, now seen corresponding path program 34 times [2022-02-15 02:06:10,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:10,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506586351] [2022-02-15 02:06:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:10,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,395 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:10,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,467 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:10,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:11,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:11,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506586351] [2022-02-15 02:06:11,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [506586351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:11,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:11,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:06:11,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945518084] [2022-02-15 02:06:11,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:06:11,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:06:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:11,333 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:11,838 INFO L93 Difference]: Finished difference Result 314 states and 384 transitions. [2022-02-15 02:06:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:06:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:11,839 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:06:11,839 INFO L226 Difference]: Without dead ends: 209 [2022-02-15 02:06:11,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:11,840 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:11,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 75 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-15 02:06:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2022-02-15 02:06:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:11,897 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:11,898 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:11,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:11,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:11,898 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 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 02:06:11,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:06:11,898 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash -742681505, now seen corresponding path program 35 times [2022-02-15 02:06:11,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:11,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624647281] [2022-02-15 02:06:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:11,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:11,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:11,982 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:12,024 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,063 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:12,747 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:12,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624647281] [2022-02-15 02:06:12,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624647281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:12,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:12,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:06:12,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090786175] [2022-02-15 02:06:12,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:12,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:06:12,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:12,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:06:12,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:12,748 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:13,222 INFO L93 Difference]: Finished difference Result 312 states and 382 transitions. [2022-02-15 02:06:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:06:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:13,222 INFO L225 Difference]: With dead ends: 312 [2022-02-15 02:06:13,223 INFO L226 Difference]: Without dead ends: 207 [2022-02-15 02:06:13,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:13,223 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:13,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-15 02:06:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2022-02-15 02:06:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 181 states have internal predecessors, (216), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-02-15 02:06:13,285 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 49 [2022-02-15 02:06:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-02-15 02:06:13,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-02-15 02:06:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:06:13,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:13,286 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 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 02:06:13,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:06:13,286 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1753798755, now seen corresponding path program 36 times [2022-02-15 02:06:13,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:13,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179012262] [2022-02-15 02:06:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:13,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:13,325 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:13,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:13,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:13,401 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:13,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:13,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:14,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:14,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179012262] [2022-02-15 02:06:14,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [179012262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:14,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:14,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:06:14,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735775314] [2022-02-15 02:06:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:14,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:06:14,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:06:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:14,068 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:14,577 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2022-02-15 02:06:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:06:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:06:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:14,578 INFO L225 Difference]: With dead ends: 323 [2022-02-15 02:06:14,578 INFO L226 Difference]: Without dead ends: 207 [2022-02-15 02:06:14,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:14,579 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:14,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 68 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-15 02:06:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2022-02-15 02:06:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 184 states have internal predecessors, (220), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2022-02-15 02:06:14,631 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 49 [2022-02-15 02:06:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2022-02-15 02:06:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2022-02-15 02:06:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:06:14,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:14,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-02-15 02:06:14,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:06:14,632 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -601579469, now seen corresponding path program 3 times [2022-02-15 02:06:14,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:14,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505779867] [2022-02-15 02:06:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:14,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:14,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:14,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:14,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:14,876 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:14,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505779867] [2022-02-15 02:06:14,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [505779867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:14,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:14,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:06:14,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883948463] [2022-02-15 02:06:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:14,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:06:14,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:06:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:06:14,881 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:15,064 INFO L93 Difference]: Finished difference Result 362 states and 446 transitions. [2022-02-15 02:06:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:06:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-02-15 02:06:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:15,065 INFO L225 Difference]: With dead ends: 362 [2022-02-15 02:06:15,065 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:06:15,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:06:15,068 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:15,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:06:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:06:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 223. [2022-02-15 02:06:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 208 states have (on average 1.2019230769230769) internal successors, (250), 211 states have internal predecessors, (250), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 267 transitions. [2022-02-15 02:06:15,119 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 267 transitions. Word has length 51 [2022-02-15 02:06:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:15,119 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 267 transitions. [2022-02-15 02:06:15,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 267 transitions. [2022-02-15 02:06:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:15,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:15,120 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 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 02:06:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:06:15,120 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash 679090812, now seen corresponding path program 37 times [2022-02-15 02:06:15,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:15,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77627679] [2022-02-15 02:06:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:15,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:15,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:15,204 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:15,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:15,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:15,273 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:15,932 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:15,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77627679] [2022-02-15 02:06:15,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [77627679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:15,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:15,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:06:15,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516861624] [2022-02-15 02:06:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:15,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:06:15,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:06:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:06:15,933 INFO L87 Difference]: Start difference. First operand 223 states and 267 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:16,347 INFO L93 Difference]: Finished difference Result 389 states and 466 transitions. [2022-02-15 02:06:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:06:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:16,348 INFO L225 Difference]: With dead ends: 389 [2022-02-15 02:06:16,348 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 02:06:16,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:16,349 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:16,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 02:06:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 226. [2022-02-15 02:06:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:16,413 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:16,413 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:16,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:16,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:16,414 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 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 02:06:16,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:06:16,414 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash -164914690, now seen corresponding path program 38 times [2022-02-15 02:06:16,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:16,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789809956] [2022-02-15 02:06:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:16,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:16,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:16,497 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:16,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:16,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:16,562 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:17,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:17,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789809956] [2022-02-15 02:06:17,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [789809956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:17,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:17,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:06:17,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378501624] [2022-02-15 02:06:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:06:17,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:06:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:06:17,283 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:17,778 INFO L93 Difference]: Finished difference Result 392 states and 469 transitions. [2022-02-15 02:06:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:06:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:17,779 INFO L225 Difference]: With dead ends: 392 [2022-02-15 02:06:17,779 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:06:17,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:17,779 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:17,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:06:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 226. [2022-02-15 02:06:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:17,844 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:17,844 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:17,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:17,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:17,845 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 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 02:06:17,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:06:17,845 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 109844924, now seen corresponding path program 39 times [2022-02-15 02:06:17,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:17,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758933594] [2022-02-15 02:06:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:17,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:17,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:17,918 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:17,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,015 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:18,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:18,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:18,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758933594] [2022-02-15 02:06:18,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758933594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:18,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:18,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:06:18,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271164062] [2022-02-15 02:06:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:06:18,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:06:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:18,814 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:19,280 INFO L93 Difference]: Finished difference Result 389 states and 466 transitions. [2022-02-15 02:06:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:06:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:19,281 INFO L225 Difference]: With dead ends: 389 [2022-02-15 02:06:19,281 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 02:06:19,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:19,282 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:19,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 02:06:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 226. [2022-02-15 02:06:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:19,349 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:19,349 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:19,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:19,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:19,350 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 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 02:06:19,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:06:19,350 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:19,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1496048318, now seen corresponding path program 40 times [2022-02-15 02:06:19,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:19,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699146137] [2022-02-15 02:06:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:19,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,436 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:19,477 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,516 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:19,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:20,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:20,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699146137] [2022-02-15 02:06:20,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699146137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:20,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:20,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:06:20,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152201263] [2022-02-15 02:06:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:20,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:06:20,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:06:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:20,193 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:20,709 INFO L93 Difference]: Finished difference Result 386 states and 463 transitions. [2022-02-15 02:06:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:06:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:20,710 INFO L225 Difference]: With dead ends: 386 [2022-02-15 02:06:20,710 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:06:20,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:20,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:20,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:06:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 226. [2022-02-15 02:06:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:20,780 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:20,780 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:20,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:20,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:20,781 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 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 02:06:20,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:06:20,781 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1558087932, now seen corresponding path program 41 times [2022-02-15 02:06:20,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:20,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35837049] [2022-02-15 02:06:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:20,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:20,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:20,863 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:20,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:20,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:20,940 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:21,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:21,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:21,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35837049] [2022-02-15 02:06:21,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35837049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:21,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:21,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:06:21,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666299806] [2022-02-15 02:06:21,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:21,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:06:21,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:06:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:21,664 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:22,170 INFO L93 Difference]: Finished difference Result 383 states and 460 transitions. [2022-02-15 02:06:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:06:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:22,171 INFO L225 Difference]: With dead ends: 383 [2022-02-15 02:06:22,171 INFO L226 Difference]: Without dead ends: 251 [2022-02-15 02:06:22,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:22,172 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:22,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 70 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-15 02:06:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2022-02-15 02:06:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:22,243 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:22,243 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:22,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 26 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:22,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:22,244 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 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 02:06:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:06:22,244 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -247350402, now seen corresponding path program 42 times [2022-02-15 02:06:22,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:22,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131278509] [2022-02-15 02:06:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:22,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,351 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:22,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,422 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:23,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:23,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131278509] [2022-02-15 02:06:23,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131278509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:23,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:23,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:06:23,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944683888] [2022-02-15 02:06:23,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:23,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:06:23,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:06:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:23,146 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:23,742 INFO L93 Difference]: Finished difference Result 380 states and 457 transitions. [2022-02-15 02:06:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:06:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:23,743 INFO L225 Difference]: With dead ends: 380 [2022-02-15 02:06:23,743 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:06:23,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:23,744 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:23,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:06:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2022-02-15 02:06:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:23,816 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:23,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:23,817 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 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 02:06:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:06:23,817 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1064998852, now seen corresponding path program 43 times [2022-02-15 02:06:23,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:23,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494994648] [2022-02-15 02:06:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:23,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:23,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:23,889 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:23,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:23,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:23,963 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:23,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:24,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:24,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:24,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494994648] [2022-02-15 02:06:24,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [494994648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:24,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:24,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:06:24,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152199582] [2022-02-15 02:06:24,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:24,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:06:24,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:06:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:24,676 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:25,208 INFO L93 Difference]: Finished difference Result 377 states and 454 transitions. [2022-02-15 02:06:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:06:25,209 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:25,209 INFO L225 Difference]: With dead ends: 377 [2022-02-15 02:06:25,209 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 02:06:25,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:25,210 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:25,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 65 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 02:06:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 226. [2022-02-15 02:06:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:25,287 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:25,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:25,288 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 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 02:06:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:06:25,288 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1641620542, now seen corresponding path program 44 times [2022-02-15 02:06:25,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:25,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872323940] [2022-02-15 02:06:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:25,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:25,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:25,374 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:25,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:25,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:25,452 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:25,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:26,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:26,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872323940] [2022-02-15 02:06:26,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [872323940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:26,291 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:26,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:06:26,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189778867] [2022-02-15 02:06:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:26,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:06:26,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:06:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:26,292 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:26,889 INFO L93 Difference]: Finished difference Result 375 states and 452 transitions. [2022-02-15 02:06:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:06:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:26,894 INFO L225 Difference]: With dead ends: 375 [2022-02-15 02:06:26,894 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 02:06:26,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:06:26,895 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:26,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 86 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 02:06:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2022-02-15 02:06:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 214 states have internal predecessors, (253), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-02-15 02:06:26,966 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 52 [2022-02-15 02:06:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:26,966 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-02-15 02:06:26,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-02-15 02:06:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:06:26,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:26,966 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 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 02:06:26,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:06:26,967 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:26,967 INFO L85 PathProgramCache]: Analyzing trace with hash 630503292, now seen corresponding path program 45 times [2022-02-15 02:06:26,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:26,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857601970] [2022-02-15 02:06:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:26,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:26,996 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:27,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:27,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:27,067 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:27,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:27,824 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:27,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857601970] [2022-02-15 02:06:27,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857601970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:27,824 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:27,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:06:27,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883301709] [2022-02-15 02:06:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:27,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:06:27,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:06:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:27,825 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:28,449 INFO L93 Difference]: Finished difference Result 386 states and 467 transitions. [2022-02-15 02:06:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:06:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:06:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:28,450 INFO L225 Difference]: With dead ends: 386 [2022-02-15 02:06:28,450 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 02:06:28,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:06:28,451 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:28,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 78 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 02:06:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-02-15 02:06:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2009345794392523) internal successors, (257), 217 states have internal predecessors, (257), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2022-02-15 02:06:28,529 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 52 [2022-02-15 02:06:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:28,529 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2022-02-15 02:06:28,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2022-02-15 02:06:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:28,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:28,529 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 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 02:06:28,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:06:28,530 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2013376257, now seen corresponding path program 46 times [2022-02-15 02:06:28,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:28,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137948322] [2022-02-15 02:06:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:28,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:28,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:28,606 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:28,638 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:28,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:28,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:28,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:28,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:29,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:29,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137948322] [2022-02-15 02:06:29,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137948322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:29,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:29,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:06:29,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192283455] [2022-02-15 02:06:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:29,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:06:29,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:06:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:06:29,412 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:29,981 INFO L93 Difference]: Finished difference Result 398 states and 476 transitions. [2022-02-15 02:06:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:06:29,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:29,982 INFO L225 Difference]: With dead ends: 398 [2022-02-15 02:06:29,982 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:06:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:29,983 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:29,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:06:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 232. [2022-02-15 02:06:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:30,063 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:30,063 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:30,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:30,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:30,063 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 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 02:06:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:06:30,063 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1252231741, now seen corresponding path program 47 times [2022-02-15 02:06:30,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:30,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170581900] [2022-02-15 02:06:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:30,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:30,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:30,264 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:30,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:30,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:30,348 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:31,084 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:31,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170581900] [2022-02-15 02:06:31,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [170581900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:31,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:31,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:06:31,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906011803] [2022-02-15 02:06:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:31,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:06:31,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:06:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:31,085 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:31,582 INFO L93 Difference]: Finished difference Result 401 states and 479 transitions. [2022-02-15 02:06:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:06:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:31,583 INFO L225 Difference]: With dead ends: 401 [2022-02-15 02:06:31,583 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 02:06:31,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:31,584 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:31,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 02:06:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 232. [2022-02-15 02:06:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:31,665 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:31,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 24 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:31,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:31,665 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 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 02:06:31,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:06:31,665 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 408226239, now seen corresponding path program 48 times [2022-02-15 02:06:31,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:31,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315780780] [2022-02-15 02:06:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:31,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:31,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:31,741 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:31,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:31,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:31,826 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:31,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:31,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:31,950 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 02:06:32,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:32,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315780780] [2022-02-15 02:06:32,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315780780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:32,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:32,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:06:32,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169591107] [2022-02-15 02:06:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:32,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:06:32,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:06:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:32,558 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:33,095 INFO L93 Difference]: Finished difference Result 398 states and 476 transitions. [2022-02-15 02:06:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:06:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:33,096 INFO L225 Difference]: With dead ends: 398 [2022-02-15 02:06:33,096 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:06:33,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:33,097 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:33,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 59 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:06:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 232. [2022-02-15 02:06:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:33,184 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:33,184 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:33,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:33,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:33,191 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 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 02:06:33,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:06:33,192 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 682985853, now seen corresponding path program 49 times [2022-02-15 02:06:33,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:33,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836897586] [2022-02-15 02:06:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:33,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:33,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:33,297 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:33,340 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:33,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:33,379 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:34,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:34,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836897586] [2022-02-15 02:06:34,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [836897586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:34,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:34,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:06:34,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008140619] [2022-02-15 02:06:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:34,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:06:34,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:06:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:34,155 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:34,657 INFO L93 Difference]: Finished difference Result 395 states and 473 transitions. [2022-02-15 02:06:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:06:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:34,658 INFO L225 Difference]: With dead ends: 395 [2022-02-15 02:06:34,658 INFO L226 Difference]: Without dead ends: 263 [2022-02-15 02:06:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:34,659 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:34,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 59 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:06:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-15 02:06:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 232. [2022-02-15 02:06:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:34,745 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:34,746 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 26 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:34,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:34,746 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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 02:06:34,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:06:34,746 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2069189247, now seen corresponding path program 50 times [2022-02-15 02:06:34,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:34,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899620170] [2022-02-15 02:06:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:34,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,821 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:34,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,909 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:35,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:35,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:35,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899620170] [2022-02-15 02:06:35,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [899620170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:35,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:35,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:06:35,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078815523] [2022-02-15 02:06:35,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:35,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:06:35,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:06:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:35,700 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:36,307 INFO L93 Difference]: Finished difference Result 392 states and 470 transitions. [2022-02-15 02:06:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:06:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:36,308 INFO L225 Difference]: With dead ends: 392 [2022-02-15 02:06:36,308 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:06:36,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:36,309 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:36,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 72 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:06:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 232. [2022-02-15 02:06:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:36,401 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:36,401 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:36,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:36,402 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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 02:06:36,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:06:36,402 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2131228861, now seen corresponding path program 51 times [2022-02-15 02:06:36,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:36,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181238743] [2022-02-15 02:06:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:36,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,472 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:36,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,549 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:36,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:37,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:37,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181238743] [2022-02-15 02:06:37,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181238743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:37,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:37,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:06:37,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576020089] [2022-02-15 02:06:37,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:37,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:06:37,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:06:37,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:37,339 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:37,916 INFO L93 Difference]: Finished difference Result 389 states and 467 transitions. [2022-02-15 02:06:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:06:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:37,917 INFO L225 Difference]: With dead ends: 389 [2022-02-15 02:06:37,917 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 02:06:37,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:37,918 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:37,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 67 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 02:06:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2022-02-15 02:06:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:38,019 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:38,020 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:38,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:38,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:38,020 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 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 02:06:38,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:06:38,020 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 325790527, now seen corresponding path program 52 times [2022-02-15 02:06:38,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:38,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472975745] [2022-02-15 02:06:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:38,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:38,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:38,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:38,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:38,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:38,180 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:38,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:38,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:38,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472975745] [2022-02-15 02:06:38,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [472975745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:38,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:38,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:06:38,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500893572] [2022-02-15 02:06:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:38,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:06:38,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:06:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:38,994 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:39,549 INFO L93 Difference]: Finished difference Result 386 states and 464 transitions. [2022-02-15 02:06:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:06:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:39,550 INFO L225 Difference]: With dead ends: 386 [2022-02-15 02:06:39,550 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:06:39,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:06:39,551 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:06:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 232. [2022-02-15 02:06:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:39,642 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:39,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:39,643 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 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 02:06:39,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:06:39,643 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -491857923, now seen corresponding path program 53 times [2022-02-15 02:06:39,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:39,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691895284] [2022-02-15 02:06:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:39,690 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:39,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:39,729 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:39,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:39,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:39,799 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:39,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:39,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:40,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:40,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691895284] [2022-02-15 02:06:40,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691895284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:40,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:40,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:06:40,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754876780] [2022-02-15 02:06:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:40,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:06:40,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:06:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:40,589 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:41,260 INFO L93 Difference]: Finished difference Result 383 states and 461 transitions. [2022-02-15 02:06:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:06:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:41,261 INFO L225 Difference]: With dead ends: 383 [2022-02-15 02:06:41,261 INFO L226 Difference]: Without dead ends: 251 [2022-02-15 02:06:41,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:06:41,261 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:41,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 84 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-15 02:06:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 232. [2022-02-15 02:06:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:41,356 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:41,356 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:41,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:41,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:41,356 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 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 02:06:41,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:06:41,356 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2080205825, now seen corresponding path program 54 times [2022-02-15 02:06:41,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:41,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146266800] [2022-02-15 02:06:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:41,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:41,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:41,439 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:41,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:41,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:41,521 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:41,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:42,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:42,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146266800] [2022-02-15 02:06:42,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [146266800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:42,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:42,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:06:42,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729046477] [2022-02-15 02:06:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:06:42,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:06:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:06:42,324 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:42,981 INFO L93 Difference]: Finished difference Result 381 states and 459 transitions. [2022-02-15 02:06:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:06:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:42,982 INFO L225 Difference]: With dead ends: 381 [2022-02-15 02:06:42,982 INFO L226 Difference]: Without dead ends: 249 [2022-02-15 02:06:42,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:06:42,983 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:42,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 70 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-15 02:06:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2022-02-15 02:06:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 217 states have (on average 1.1981566820276497) internal successors, (260), 220 states have internal predecessors, (260), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2022-02-15 02:06:43,074 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 55 [2022-02-15 02:06:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2022-02-15 02:06:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2022-02-15 02:06:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:06:43,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:43,074 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 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 02:06:43,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:06:43,074 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:43,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1203644221, now seen corresponding path program 55 times [2022-02-15 02:06:43,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:43,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172793242] [2022-02-15 02:06:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:43,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:43,122 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:43,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:43,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:43,193 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:43,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:43,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:44,014 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:44,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172793242] [2022-02-15 02:06:44,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172793242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:44,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:44,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:06:44,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80372449] [2022-02-15 02:06:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:44,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:06:44,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:06:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:06:44,015 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:44,659 INFO L93 Difference]: Finished difference Result 392 states and 474 transitions. [2022-02-15 02:06:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:06:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:06:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:44,660 INFO L225 Difference]: With dead ends: 392 [2022-02-15 02:06:44,660 INFO L226 Difference]: Without dead ends: 249 [2022-02-15 02:06:44,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:06:44,661 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:44,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 75 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-15 02:06:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 235. [2022-02-15 02:06:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 220 states have (on average 1.2) internal successors, (264), 223 states have internal predecessors, (264), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 281 transitions. [2022-02-15 02:06:44,754 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 281 transitions. Word has length 55 [2022-02-15 02:06:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:44,754 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 281 transitions. [2022-02-15 02:06:44,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 281 transitions. [2022-02-15 02:06:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 02:06:44,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:44,755 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2022-02-15 02:06:44,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:06:44,755 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1847626205, now seen corresponding path program 4 times [2022-02-15 02:06:44,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:44,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775915903] [2022-02-15 02:06:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:44,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,888 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:44,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:44,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:45,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:45,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775915903] [2022-02-15 02:06:45,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [775915903] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:45,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:45,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:06:45,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901853264] [2022-02-15 02:06:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:45,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:06:45,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:06:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:06:45,045 INFO L87 Difference]: Start difference. First operand 235 states and 281 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:45,283 INFO L93 Difference]: Finished difference Result 431 states and 523 transitions. [2022-02-15 02:06:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:06:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-15 02:06:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:45,284 INFO L225 Difference]: With dead ends: 431 [2022-02-15 02:06:45,284 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:06:45,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:06:45,285 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:45,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 29 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:06:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:06:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 262. [2022-02-15 02:06:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 250 states have internal predecessors, (294), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 311 transitions. [2022-02-15 02:06:45,381 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 311 transitions. Word has length 57 [2022-02-15 02:06:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:45,381 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 311 transitions. [2022-02-15 02:06:45,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 311 transitions. [2022-02-15 02:06:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:45,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:45,381 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 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 02:06:45,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:06:45,382 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash -490608740, now seen corresponding path program 56 times [2022-02-15 02:06:45,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:45,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981029870] [2022-02-15 02:06:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:45,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:45,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:45,454 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:45,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:45,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:45,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:46,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:46,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981029870] [2022-02-15 02:06:46,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981029870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:46,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:46,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:06:46,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633565137] [2022-02-15 02:06:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:46,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:06:46,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:06:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:06:46,395 INFO L87 Difference]: Start difference. First operand 262 states and 311 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:46,998 INFO L93 Difference]: Finished difference Result 464 states and 549 transitions. [2022-02-15 02:06:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:06:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:46,999 INFO L225 Difference]: With dead ends: 464 [2022-02-15 02:06:46,999 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 02:06:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:47,000 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 61 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 02:06:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 265. [2022-02-15 02:06:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:47,114 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:47,114 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:47,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:47,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:47,114 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 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 02:06:47,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:06:47,114 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash -66962018, now seen corresponding path program 57 times [2022-02-15 02:06:47,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:47,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470537625] [2022-02-15 02:06:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:47,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:47,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:47,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:47,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:47,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:47,272 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:48,084 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:48,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470537625] [2022-02-15 02:06:48,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470537625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:48,085 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:48,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:06:48,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691265911] [2022-02-15 02:06:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:48,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:06:48,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:06:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:06:48,086 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:48,733 INFO L93 Difference]: Finished difference Result 467 states and 552 transitions. [2022-02-15 02:06:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:06:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:48,734 INFO L225 Difference]: With dead ends: 467 [2022-02-15 02:06:48,737 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:06:48,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:48,737 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:48,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 70 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:06:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 265. [2022-02-15 02:06:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:48,848 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:48,848 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:48,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:48,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:48,848 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 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 02:06:48,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 02:06:48,848 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1096321316, now seen corresponding path program 58 times [2022-02-15 02:06:48,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:48,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573884973] [2022-02-15 02:06:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:48,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:48,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:48,929 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:48,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:49,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:49,011 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:49,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:49,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:49,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:49,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573884973] [2022-02-15 02:06:49,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573884973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:49,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:49,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:06:49,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624902818] [2022-02-15 02:06:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:06:49,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:06:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:06:49,837 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:50,542 INFO L93 Difference]: Finished difference Result 464 states and 549 transitions. [2022-02-15 02:06:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:06:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:50,543 INFO L225 Difference]: With dead ends: 464 [2022-02-15 02:06:50,543 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 02:06:50,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:50,543 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:50,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 77 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 02:06:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 265. [2022-02-15 02:06:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:50,662 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:50,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:50,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:50,663 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 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 02:06:50,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 02:06:50,663 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1940326818, now seen corresponding path program 59 times [2022-02-15 02:06:50,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:50,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452597910] [2022-02-15 02:06:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:50,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:50,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:50,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:50,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:50,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:50,825 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:50,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:50,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:51,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:51,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452597910] [2022-02-15 02:06:51,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [452597910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:51,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:51,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:06:51,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316974351] [2022-02-15 02:06:51,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:06:51,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:06:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:06:51,691 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:52,504 INFO L93 Difference]: Finished difference Result 461 states and 546 transitions. [2022-02-15 02:06:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:06:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:52,505 INFO L225 Difference]: With dead ends: 461 [2022-02-15 02:06:52,505 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:06:52,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:52,506 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:52,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 81 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:06:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 265. [2022-02-15 02:06:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:52,625 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:52,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:52,626 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 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 02:06:52,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 02:06:52,626 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1665567204, now seen corresponding path program 60 times [2022-02-15 02:06:52,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:52,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494732914] [2022-02-15 02:06:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:52,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:52,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:52,707 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:52,739 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:52,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:52,779 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:52,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:52,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:52,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:53,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:53,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494732914] [2022-02-15 02:06:53,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [494732914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:53,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:53,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:06:53,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389922555] [2022-02-15 02:06:53,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:53,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:06:53,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:06:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:06:53,602 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:54,335 INFO L93 Difference]: Finished difference Result 458 states and 543 transitions. [2022-02-15 02:06:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:06:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:54,336 INFO L225 Difference]: With dead ends: 458 [2022-02-15 02:06:54,336 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 02:06:54,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:54,337 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:54,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 70 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 02:06:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 265. [2022-02-15 02:06:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:54,459 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:54,459 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:54,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:54,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:54,459 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 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 02:06:54,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 02:06:54,459 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash -279363810, now seen corresponding path program 61 times [2022-02-15 02:06:54,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:54,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833240947] [2022-02-15 02:06:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:54,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,541 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:54,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,631 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:55,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:55,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833240947] [2022-02-15 02:06:55,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833240947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:55,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:55,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:06:55,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420924306] [2022-02-15 02:06:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:06:55,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:06:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:06:55,464 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:56,154 INFO L93 Difference]: Finished difference Result 455 states and 540 transitions. [2022-02-15 02:06:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:06:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:56,155 INFO L225 Difference]: With dead ends: 455 [2022-02-15 02:06:56,155 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:06:56,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:06:56,155 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:56,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 62 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:06:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 265. [2022-02-15 02:06:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:56,279 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:56,279 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:56,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:56,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:56,280 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 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 02:06:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 02:06:56,280 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash -217324196, now seen corresponding path program 62 times [2022-02-15 02:06:56,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:56,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350224383] [2022-02-15 02:06:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:56,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:56,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:56,368 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:56,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:56,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:56,439 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:56,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:57,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:57,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350224383] [2022-02-15 02:06:57,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350224383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:57,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:57,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:06:57,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37063160] [2022-02-15 02:06:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:57,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:06:57,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:06:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:06:57,286 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:58,004 INFO L93 Difference]: Finished difference Result 452 states and 537 transitions. [2022-02-15 02:06:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:06:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:58,007 INFO L225 Difference]: With dead ends: 452 [2022-02-15 02:06:58,007 INFO L226 Difference]: Without dead ends: 293 [2022-02-15 02:06:58,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:06:58,008 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:58,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:06:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-15 02:06:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 265. [2022-02-15 02:06:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:58,133 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:58,133 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:58,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 30 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:58,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:58,134 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 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 02:06:58,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 02:06:58,134 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2022762530, now seen corresponding path program 63 times [2022-02-15 02:06:58,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:58,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629151360] [2022-02-15 02:06:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:58,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,210 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:58,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,290 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:58,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:06:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:59,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:59,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629151360] [2022-02-15 02:06:59,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629151360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:59,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:59,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:06:59,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726913801] [2022-02-15 02:06:59,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:59,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:06:59,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:06:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:06:59,149 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:59,771 INFO L93 Difference]: Finished difference Result 449 states and 534 transitions. [2022-02-15 02:06:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:06:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:06:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:59,772 INFO L225 Difference]: With dead ends: 449 [2022-02-15 02:06:59,772 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:06:59,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:06:59,773 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:59,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 56 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:06:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:06:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 265. [2022-02-15 02:06:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:06:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:06:59,898 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:06:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:59,898 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:06:59,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:06:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:06:59,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:59,899 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 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 02:06:59,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 02:06:59,899 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1454556316, now seen corresponding path program 64 times [2022-02-15 02:06:59,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:59,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818522155] [2022-02-15 02:06:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:59,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:59,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:59,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:00,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,044 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:00,913 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:00,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818522155] [2022-02-15 02:07:00,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [818522155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:00,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:00,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:07:00,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762353686] [2022-02-15 02:07:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:00,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:07:00,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:07:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:07:00,914 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:01,648 INFO L93 Difference]: Finished difference Result 446 states and 531 transitions. [2022-02-15 02:07:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:07:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:07:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:01,649 INFO L225 Difference]: With dead ends: 446 [2022-02-15 02:07:01,649 INFO L226 Difference]: Without dead ends: 287 [2022-02-15 02:07:01,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:01,650 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:01,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 70 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-15 02:07:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 265. [2022-02-15 02:07:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:07:01,776 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:07:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:01,776 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:07:01,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 32 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:07:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:07:01,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:01,777 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 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 02:07:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 02:07:01,777 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash -133791586, now seen corresponding path program 65 times [2022-02-15 02:07:01,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:01,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732135824] [2022-02-15 02:07:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:01,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:01,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:01,861 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:01,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:01,931 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:01,932 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:02,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:02,802 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:02,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732135824] [2022-02-15 02:07:02,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732135824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:02,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:02,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:07:02,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198367699] [2022-02-15 02:07:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:07:02,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:07:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:07:02,803 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:03,415 INFO L93 Difference]: Finished difference Result 444 states and 529 transitions. [2022-02-15 02:07:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:07:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:07:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:03,416 INFO L225 Difference]: With dead ends: 444 [2022-02-15 02:07:03,416 INFO L226 Difference]: Without dead ends: 285 [2022-02-15 02:07:03,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:07:03,417 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:03,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:07:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-15 02:07:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-02-15 02:07:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 250 states have (on average 1.188) internal successors, (297), 253 states have internal predecessors, (297), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 314 transitions. [2022-02-15 02:07:03,545 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 314 transitions. Word has length 58 [2022-02-15 02:07:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:03,546 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 314 transitions. [2022-02-15 02:07:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 314 transitions. [2022-02-15 02:07:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:07:03,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:03,546 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 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 02:07:03,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 02:07:03,546 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1144908836, now seen corresponding path program 66 times [2022-02-15 02:07:03,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:03,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463189671] [2022-02-15 02:07:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:03,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:03,578 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:03,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:03,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:03,649 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:04,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:04,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463189671] [2022-02-15 02:07:04,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463189671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:04,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:04,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:07:04,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456331881] [2022-02-15 02:07:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:04,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:07:04,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:07:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:04,526 INFO L87 Difference]: Start difference. First operand 265 states and 314 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 34 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:05,354 INFO L93 Difference]: Finished difference Result 455 states and 544 transitions. [2022-02-15 02:07:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:07:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 34 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:07:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:05,355 INFO L225 Difference]: With dead ends: 455 [2022-02-15 02:07:05,355 INFO L226 Difference]: Without dead ends: 285 [2022-02-15 02:07:05,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:07:05,355 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:05,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 87 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-15 02:07:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 268. [2022-02-15 02:07:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 253 states have (on average 1.1897233201581028) internal successors, (301), 256 states have internal predecessors, (301), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 318 transitions. [2022-02-15 02:07:05,492 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 318 transitions. Word has length 58 [2022-02-15 02:07:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:05,492 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 318 transitions. [2022-02-15 02:07:05,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 34 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 318 transitions. [2022-02-15 02:07:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:05,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:05,493 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 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 02:07:05,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 02:07:05,493 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash 831909855, now seen corresponding path program 67 times [2022-02-15 02:07:05,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:05,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129216740] [2022-02-15 02:07:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:05,536 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:05,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:05,575 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:05,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:05,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:05,652 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:05,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:05,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:06,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:06,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129216740] [2022-02-15 02:07:06,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129216740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:06,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:06,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:07:06,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032866389] [2022-02-15 02:07:06,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:07:06,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:07:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:07:06,490 INFO L87 Difference]: Start difference. First operand 268 states and 318 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:07,206 INFO L93 Difference]: Finished difference Result 473 states and 559 transitions. [2022-02-15 02:07:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:07:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:07,208 INFO L225 Difference]: With dead ends: 473 [2022-02-15 02:07:07,208 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:07:07,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:07:07,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:07:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:07:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2022-02-15 02:07:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:07,354 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:07,355 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:07,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:07,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:07,355 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 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 02:07:07,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 02:07:07,355 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1217477987, now seen corresponding path program 68 times [2022-02-15 02:07:07,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:07,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387910318] [2022-02-15 02:07:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:07,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:07,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:07,468 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:07,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:07,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:07,536 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:07,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:08,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:08,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387910318] [2022-02-15 02:07:08,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387910318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:08,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:08,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:07:08,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146345975] [2022-02-15 02:07:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:08,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:07:08,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:07:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:07:08,439 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:09,216 INFO L93 Difference]: Finished difference Result 476 states and 562 transitions. [2022-02-15 02:07:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:07:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:09,217 INFO L225 Difference]: With dead ends: 476 [2022-02-15 02:07:09,217 INFO L226 Difference]: Without dead ends: 317 [2022-02-15 02:07:09,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:07:09,218 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:09,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 65 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-15 02:07:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 271. [2022-02-15 02:07:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:09,365 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:09,365 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:09,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:09,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:09,366 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 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 02:07:09,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 02:07:09,366 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -793831265, now seen corresponding path program 69 times [2022-02-15 02:07:09,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:09,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441095650] [2022-02-15 02:07:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:09,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:09,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:09,438 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:09,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:09,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:09,508 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:10,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:10,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441095650] [2022-02-15 02:07:10,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441095650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:10,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:10,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:07:10,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950699316] [2022-02-15 02:07:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:07:10,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:07:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:07:10,374 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:11,161 INFO L93 Difference]: Finished difference Result 473 states and 559 transitions. [2022-02-15 02:07:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:07:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:11,163 INFO L225 Difference]: With dead ends: 473 [2022-02-15 02:07:11,163 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:07:11,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:07:11,163 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:11,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 78 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:07:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2022-02-15 02:07:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:11,317 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:11,317 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:11,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:11,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:11,317 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 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 02:07:11,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 02:07:11,317 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1823190563, now seen corresponding path program 70 times [2022-02-15 02:07:11,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:11,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361835520] [2022-02-15 02:07:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:11,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:11,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:11,400 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:11,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:11,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:11,463 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:11,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:11,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:11,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:11,589 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 02:07:12,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:12,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361835520] [2022-02-15 02:07:12,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361835520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:12,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:12,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:07:12,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168115954] [2022-02-15 02:07:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:12,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:07:12,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:07:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:07:12,348 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:13,157 INFO L93 Difference]: Finished difference Result 470 states and 556 transitions. [2022-02-15 02:07:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:07:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:13,158 INFO L225 Difference]: With dead ends: 470 [2022-02-15 02:07:13,158 INFO L226 Difference]: Without dead ends: 311 [2022-02-15 02:07:13,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:07:13,159 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:13,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:13,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-15 02:07:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 271. [2022-02-15 02:07:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:13,314 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:13,314 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:13,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:13,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:13,315 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 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 02:07:13,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 02:07:13,315 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1627771231, now seen corresponding path program 71 times [2022-02-15 02:07:13,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:13,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652443714] [2022-02-15 02:07:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:13,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,381 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:13,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,452 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:13,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:14,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:14,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652443714] [2022-02-15 02:07:14,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [652443714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:14,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:14,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:07:14,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008499785] [2022-02-15 02:07:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:07:14,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:07:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:07:14,345 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:15,201 INFO L93 Difference]: Finished difference Result 467 states and 553 transitions. [2022-02-15 02:07:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:07:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:15,202 INFO L225 Difference]: With dead ends: 467 [2022-02-15 02:07:15,202 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:07:15,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:07:15,203 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:15,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 70 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:07:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 271. [2022-02-15 02:07:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:15,358 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:15,359 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:15,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:15,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:15,359 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 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 02:07:15,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 02:07:15,359 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1902530845, now seen corresponding path program 72 times [2022-02-15 02:07:15,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:15,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421384384] [2022-02-15 02:07:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:15,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:15,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:15,465 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:15,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:15,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:15,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:15,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:15,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:16,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:16,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421384384] [2022-02-15 02:07:16,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421384384] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:16,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:16,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:07:16,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245574543] [2022-02-15 02:07:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:16,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:07:16,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:07:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:07:16,410 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:17,239 INFO L93 Difference]: Finished difference Result 464 states and 550 transitions. [2022-02-15 02:07:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:07:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:17,240 INFO L225 Difference]: With dead ends: 464 [2022-02-15 02:07:17,240 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 02:07:17,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:07:17,241 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:17,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 84 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 02:07:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 271. [2022-02-15 02:07:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:17,399 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:17,399 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:17,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:17,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:17,400 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 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 02:07:17,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 02:07:17,400 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1006233057, now seen corresponding path program 73 times [2022-02-15 02:07:17,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:17,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973116621] [2022-02-15 02:07:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:17,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,481 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,553 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:17,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:18,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:18,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973116621] [2022-02-15 02:07:18,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973116621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:18,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:18,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:07:18,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486095527] [2022-02-15 02:07:18,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:18,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:07:18,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:07:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:07:18,501 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:19,257 INFO L93 Difference]: Finished difference Result 461 states and 547 transitions. [2022-02-15 02:07:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:07:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:19,258 INFO L225 Difference]: With dead ends: 461 [2022-02-15 02:07:19,258 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:07:19,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:07:19,259 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:19,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:07:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 271. [2022-02-15 02:07:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:19,425 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:19,425 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:19,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 31 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:19,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:19,426 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 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 02:07:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 02:07:19,426 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash -944193443, now seen corresponding path program 74 times [2022-02-15 02:07:19,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:19,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505736157] [2022-02-15 02:07:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:19,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:19,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:19,504 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:19,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:19,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:19,564 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:20,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:20,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505736157] [2022-02-15 02:07:20,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505736157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:20,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:20,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:07:20,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610487224] [2022-02-15 02:07:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:20,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:07:20,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:07:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:07:20,461 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:21,271 INFO L93 Difference]: Finished difference Result 458 states and 544 transitions. [2022-02-15 02:07:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:07:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:21,272 INFO L225 Difference]: With dead ends: 458 [2022-02-15 02:07:21,272 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 02:07:21,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:21,273 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 79 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 02:07:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 271. [2022-02-15 02:07:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:21,449 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:21,449 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:21,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:21,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:21,450 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 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 02:07:21,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 02:07:21,450 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1545335519, now seen corresponding path program 75 times [2022-02-15 02:07:21,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:21,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848849587] [2022-02-15 02:07:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:21,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:21,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:21,529 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:21,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:21,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:21,609 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:21,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:22,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:22,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848849587] [2022-02-15 02:07:22,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848849587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:22,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:22,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:07:22,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778393699] [2022-02-15 02:07:22,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:22,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:07:22,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:07:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:07:22,576 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:23,485 INFO L93 Difference]: Finished difference Result 455 states and 541 transitions. [2022-02-15 02:07:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:07:23,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:23,487 INFO L225 Difference]: With dead ends: 455 [2022-02-15 02:07:23,487 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:07:23,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:07:23,488 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:23,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 92 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:07:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 271. [2022-02-15 02:07:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:23,657 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:23,657 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:23,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:23,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:23,657 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 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 02:07:23,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 02:07:23,657 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash 727687069, now seen corresponding path program 76 times [2022-02-15 02:07:23,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:23,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392847142] [2022-02-15 02:07:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:23,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:23,719 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:23,720 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:23,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:23,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:23,790 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:24,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:24,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392847142] [2022-02-15 02:07:24,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392847142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:24,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:24,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:07:24,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030288799] [2022-02-15 02:07:24,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:24,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:07:24,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:07:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:24,717 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 34 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:25,669 INFO L93 Difference]: Finished difference Result 452 states and 538 transitions. [2022-02-15 02:07:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:07:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 34 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:25,670 INFO L225 Difference]: With dead ends: 452 [2022-02-15 02:07:25,670 INFO L226 Difference]: Without dead ends: 293 [2022-02-15 02:07:25,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:07:25,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:25,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:07:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-15 02:07:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 271. [2022-02-15 02:07:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:25,845 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 34 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:25,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:25,846 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 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 02:07:25,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 02:07:25,846 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash -860660833, now seen corresponding path program 77 times [2022-02-15 02:07:25,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:25,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503289028] [2022-02-15 02:07:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:25,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:25,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:25,951 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:26,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:26,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:26,037 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:26,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:26,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:27,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:27,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503289028] [2022-02-15 02:07:27,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503289028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:27,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:27,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:07:27,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616484872] [2022-02-15 02:07:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:27,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:07:27,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:07:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:07:27,047 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:27,914 INFO L93 Difference]: Finished difference Result 450 states and 536 transitions. [2022-02-15 02:07:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:07:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:27,915 INFO L225 Difference]: With dead ends: 450 [2022-02-15 02:07:27,915 INFO L226 Difference]: Without dead ends: 291 [2022-02-15 02:07:27,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:07:27,916 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:27,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-15 02:07:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 271. [2022-02-15 02:07:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.1875) internal successors, (304), 259 states have internal predecessors, (304), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2022-02-15 02:07:28,080 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 61 [2022-02-15 02:07:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:28,081 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2022-02-15 02:07:28,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2022-02-15 02:07:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:07:28,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:28,081 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 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 02:07:28,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 02:07:28,081 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1871778083, now seen corresponding path program 78 times [2022-02-15 02:07:28,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:28,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092825001] [2022-02-15 02:07:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:28,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:28,123 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:28,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:28,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:28,184 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:29,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:29,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092825001] [2022-02-15 02:07:29,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092825001] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:29,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:29,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:07:29,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131966407] [2022-02-15 02:07:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:07:29,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:07:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:07:29,164 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 36 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:29,891 INFO L93 Difference]: Finished difference Result 461 states and 551 transitions. [2022-02-15 02:07:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:07:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 36 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:07:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:29,892 INFO L225 Difference]: With dead ends: 461 [2022-02-15 02:07:29,893 INFO L226 Difference]: Without dead ends: 291 [2022-02-15 02:07:29,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:07:29,893 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:29,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 59 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-15 02:07:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 274. [2022-02-15 02:07:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 259 states have (on average 1.1891891891891893) internal successors, (308), 262 states have internal predecessors, (308), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 325 transitions. [2022-02-15 02:07:30,058 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 325 transitions. Word has length 61 [2022-02-15 02:07:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:30,059 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 325 transitions. [2022-02-15 02:07:30,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 36 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 325 transitions. [2022-02-15 02:07:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:07:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:30,059 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2022-02-15 02:07:30,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 02:07:30,059 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1779769613, now seen corresponding path program 5 times [2022-02-15 02:07:30,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:30,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473123721] [2022-02-15 02:07:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:30,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:30,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:30,159 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:30,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:30,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473123721] [2022-02-15 02:07:30,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473123721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:30,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:30,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:07:30,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446139267] [2022-02-15 02:07:30,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:30,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:07:30,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:07:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:07:30,331 INFO L87 Difference]: Start difference. First operand 274 states and 325 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:30,703 INFO L93 Difference]: Finished difference Result 500 states and 600 transitions. [2022-02-15 02:07:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:07:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-02-15 02:07:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:30,704 INFO L225 Difference]: With dead ends: 500 [2022-02-15 02:07:30,704 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:07:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:07:30,704 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:30,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 33 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:07:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:07:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 301. [2022-02-15 02:07:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 286 states have (on average 1.1818181818181819) internal successors, (338), 289 states have internal predecessors, (338), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 355 transitions. [2022-02-15 02:07:30,878 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 355 transitions. Word has length 63 [2022-02-15 02:07:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:30,878 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 355 transitions. [2022-02-15 02:07:30,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 355 transitions. [2022-02-15 02:07:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:30,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:30,879 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 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 02:07:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 02:07:30,879 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2046600004, now seen corresponding path program 79 times [2022-02-15 02:07:30,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:30,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934490389] [2022-02-15 02:07:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:30,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:30,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:30,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:31,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:31,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:31,050 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:31,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:31,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:31,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:31,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934490389] [2022-02-15 02:07:31,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [934490389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:31,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:31,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:07:31,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116469354] [2022-02-15 02:07:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:31,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:07:31,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:07:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:07:31,951 INFO L87 Difference]: Start difference. First operand 301 states and 355 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:32,817 INFO L93 Difference]: Finished difference Result 539 states and 632 transitions. [2022-02-15 02:07:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:07:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:32,818 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:07:32,818 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 02:07:32,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:07:32,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:32,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 64 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 02:07:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2022-02-15 02:07:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:33,013 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:33,013 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:33,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:33,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:33,014 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 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 02:07:33,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 02:07:33,014 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1895278910, now seen corresponding path program 80 times [2022-02-15 02:07:33,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:33,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253817810] [2022-02-15 02:07:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:33,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,096 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:33,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,179 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:33,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:33,297 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 02:07:34,096 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:34,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253817810] [2022-02-15 02:07:34,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253817810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:34,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:34,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:07:34,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011687876] [2022-02-15 02:07:34,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:07:34,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:07:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:07:34,097 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:35,124 INFO L93 Difference]: Finished difference Result 542 states and 635 transitions. [2022-02-15 02:07:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:07:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:35,125 INFO L225 Difference]: With dead ends: 542 [2022-02-15 02:07:35,125 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:07:35,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:07:35,126 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:35,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 76 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:07:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 304. [2022-02-15 02:07:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:35,326 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:35,326 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:35,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:35,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:35,326 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 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 02:07:35,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 02:07:35,326 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -154108932, now seen corresponding path program 81 times [2022-02-15 02:07:35,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:35,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251310977] [2022-02-15 02:07:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:35,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:35,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:35,399 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:35,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:35,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:35,465 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:35,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:35,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:36,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:36,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251310977] [2022-02-15 02:07:36,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [251310977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:36,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:36,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:07:36,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306108265] [2022-02-15 02:07:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:36,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:07:36,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:07:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:07:36,410 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:37,366 INFO L93 Difference]: Finished difference Result 539 states and 632 transitions. [2022-02-15 02:07:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:07:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:37,368 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:07:37,368 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 02:07:37,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:07:37,368 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:37,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 02:07:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2022-02-15 02:07:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:37,574 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:37,574 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:37,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:37,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:37,575 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 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 02:07:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 02:07:37,575 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 269537790, now seen corresponding path program 82 times [2022-02-15 02:07:37,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:37,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225718852] [2022-02-15 02:07:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:37,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:37,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:37,663 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:37,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:37,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:37,744 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:37,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:38,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:38,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225718852] [2022-02-15 02:07:38,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225718852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:38,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:38,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:07:38,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482152931] [2022-02-15 02:07:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:38,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:07:38,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:07:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:07:38,677 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:39,736 INFO L93 Difference]: Finished difference Result 536 states and 629 transitions. [2022-02-15 02:07:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:07:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:39,737 INFO L225 Difference]: With dead ends: 536 [2022-02-15 02:07:39,737 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:07:39,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:07:39,738 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:39,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 86 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:07:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2022-02-15 02:07:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:39,950 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:39,950 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:39,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:39,951 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 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 02:07:39,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 02:07:39,951 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:39,951 INFO L85 PathProgramCache]: Analyzing trace with hash -759821508, now seen corresponding path program 83 times [2022-02-15 02:07:39,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:39,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702640690] [2022-02-15 02:07:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:39,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:40,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:40,025 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:40,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:40,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:40,110 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:40,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:40,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:41,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:41,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702640690] [2022-02-15 02:07:41,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702640690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:41,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:41,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:07:41,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267634123] [2022-02-15 02:07:41,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:41,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:07:41,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:07:41,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:07:41,056 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:42,087 INFO L93 Difference]: Finished difference Result 533 states and 626 transitions. [2022-02-15 02:07:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:07:42,088 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:42,089 INFO L225 Difference]: With dead ends: 533 [2022-02-15 02:07:42,089 INFO L226 Difference]: Without dead ends: 347 [2022-02-15 02:07:42,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:07:42,089 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:42,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 73 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-15 02:07:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 304. [2022-02-15 02:07:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:42,324 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:42,324 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:42,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:42,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:42,325 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 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 02:07:42,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 02:07:42,325 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1603827010, now seen corresponding path program 84 times [2022-02-15 02:07:42,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:42,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281784688] [2022-02-15 02:07:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:42,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:42,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:42,399 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:42,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:42,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:42,483 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:42,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:42,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:43,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:43,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281784688] [2022-02-15 02:07:43,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [281784688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:43,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:43,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:07:43,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946642538] [2022-02-15 02:07:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:43,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:07:43,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:07:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:07:43,437 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:44,409 INFO L93 Difference]: Finished difference Result 530 states and 623 transitions. [2022-02-15 02:07:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:07:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:44,410 INFO L225 Difference]: With dead ends: 530 [2022-02-15 02:07:44,410 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:07:44,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:07:44,411 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:44,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 65 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:07:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 304. [2022-02-15 02:07:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:44,651 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:44,651 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:44,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:44,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:44,652 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 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 02:07:44,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 02:07:44,652 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1329067396, now seen corresponding path program 85 times [2022-02-15 02:07:44,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:44,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781289157] [2022-02-15 02:07:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:44,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:44,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:44,731 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:44,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:44,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:44,821 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:44,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:44,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:45,889 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:45,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781289157] [2022-02-15 02:07:45,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [781289157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:45,890 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:45,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:07:45,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968885680] [2022-02-15 02:07:45,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:45,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:07:45,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:07:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:07:45,891 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:46,884 INFO L93 Difference]: Finished difference Result 527 states and 620 transitions. [2022-02-15 02:07:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:07:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:46,885 INFO L225 Difference]: With dead ends: 527 [2022-02-15 02:07:46,885 INFO L226 Difference]: Without dead ends: 341 [2022-02-15 02:07:46,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:46,886 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:46,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 76 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-15 02:07:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 304. [2022-02-15 02:07:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:47,121 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:47,122 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:47,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:47,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:47,122 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 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 02:07:47,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 02:07:47,122 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash 57135998, now seen corresponding path program 86 times [2022-02-15 02:07:47,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:47,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269825005] [2022-02-15 02:07:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:47,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:47,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:47,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:47,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:47,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:47,270 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:47,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:48,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:48,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269825005] [2022-02-15 02:07:48,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269825005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:48,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:48,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:07:48,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967950097] [2022-02-15 02:07:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:07:48,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:07:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:07:48,260 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:49,320 INFO L93 Difference]: Finished difference Result 524 states and 617 transitions. [2022-02-15 02:07:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:07:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:49,321 INFO L225 Difference]: With dead ends: 524 [2022-02-15 02:07:49,321 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:07:49,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:07:49,321 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:49,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 88 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:07:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 304. [2022-02-15 02:07:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:49,550 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:49,550 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:49,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:49,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:49,550 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 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 02:07:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 02:07:49,550 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 119175612, now seen corresponding path program 87 times [2022-02-15 02:07:49,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:49,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56773441] [2022-02-15 02:07:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:49,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:49,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:49,651 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:49,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:49,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:49,738 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:49,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:50,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56773441] [2022-02-15 02:07:50,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [56773441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:50,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:50,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:07:50,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270230950] [2022-02-15 02:07:50,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:50,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:07:50,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:07:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:07:50,764 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:51,814 INFO L93 Difference]: Finished difference Result 521 states and 614 transitions. [2022-02-15 02:07:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:07:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:51,815 INFO L225 Difference]: With dead ends: 521 [2022-02-15 02:07:51,815 INFO L226 Difference]: Without dead ends: 335 [2022-02-15 02:07:51,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:07:51,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:51,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 76 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-15 02:07:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 304. [2022-02-15 02:07:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:52,052 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:52,052 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:52,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:52,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:52,052 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 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 02:07:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 02:07:52,052 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1686262722, now seen corresponding path program 88 times [2022-02-15 02:07:52,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:52,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258596389] [2022-02-15 02:07:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:52,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:52,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:52,125 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:52,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:52,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:52,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:52,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:52,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:52,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:53,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:53,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258596389] [2022-02-15 02:07:53,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258596389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:53,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:53,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:07:53,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117189904] [2022-02-15 02:07:53,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:53,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:07:53,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:07:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:07:53,212 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:54,243 INFO L93 Difference]: Finished difference Result 518 states and 611 transitions. [2022-02-15 02:07:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:07:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:54,244 INFO L225 Difference]: With dead ends: 518 [2022-02-15 02:07:54,244 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:07:54,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:07:54,245 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:54,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 88 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:07:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 304. [2022-02-15 02:07:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:54,487 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:54,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:54,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:54,488 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 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 02:07:54,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 02:07:54,488 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1791056124, now seen corresponding path program 89 times [2022-02-15 02:07:54,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:54,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264895423] [2022-02-15 02:07:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:54,534 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:54,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:54,565 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:54,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:54,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:54,649 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:55,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:55,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264895423] [2022-02-15 02:07:55,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264895423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:55,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:55,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:07:55,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233248886] [2022-02-15 02:07:55,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:55,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:07:55,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:07:55,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:07:55,698 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:56,702 INFO L93 Difference]: Finished difference Result 515 states and 608 transitions. [2022-02-15 02:07:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:07:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:56,703 INFO L225 Difference]: With dead ends: 515 [2022-02-15 02:07:56,703 INFO L226 Difference]: Without dead ends: 329 [2022-02-15 02:07:56,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:07:56,704 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:56,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 66 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:07:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-15 02:07:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 304. [2022-02-15 02:07:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:56,933 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:56,933 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:56,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:56,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:56,933 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 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 02:07:56,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 02:07:56,933 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash 202708222, now seen corresponding path program 90 times [2022-02-15 02:07:56,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:56,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956406547] [2022-02-15 02:07:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:56,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:57,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:57,005 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:57,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:57,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:57,081 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,201 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 02:07:58,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:58,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956406547] [2022-02-15 02:07:58,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956406547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:58,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:58,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:07:58,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33635346] [2022-02-15 02:07:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:07:58,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:07:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:07:58,130 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 37 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:59,019 INFO L93 Difference]: Finished difference Result 513 states and 606 transitions. [2022-02-15 02:07:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:07:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 37 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:07:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:59,020 INFO L225 Difference]: With dead ends: 513 [2022-02-15 02:07:59,020 INFO L226 Difference]: Without dead ends: 327 [2022-02-15 02:07:59,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:07:59,021 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:59,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:07:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-15 02:07:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 304. [2022-02-15 02:07:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 289 states have (on average 1.179930795847751) internal successors, (341), 292 states have internal predecessors, (341), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:07:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 358 transitions. [2022-02-15 02:07:59,257 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 358 transitions. Word has length 64 [2022-02-15 02:07:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 358 transitions. [2022-02-15 02:07:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 37 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 358 transitions. [2022-02-15 02:07:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:07:59,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:59,258 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 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 02:07:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 02:07:59,258 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -808409028, now seen corresponding path program 91 times [2022-02-15 02:07:59,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:59,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468854462] [2022-02-15 02:07:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:59,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:59,300 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:59,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:59,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:59,372 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:59,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:07:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:00,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:00,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468854462] [2022-02-15 02:08:00,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468854462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:00,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:00,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:08:00,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560818246] [2022-02-15 02:08:00,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:00,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:08:00,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:08:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:08:00,445 INFO L87 Difference]: Start difference. First operand 304 states and 358 transitions. Second operand has 40 states, 40 states have (on average 1.45) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:01,514 INFO L93 Difference]: Finished difference Result 524 states and 621 transitions. [2022-02-15 02:08:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:08:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.45) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:08:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:01,515 INFO L225 Difference]: With dead ends: 524 [2022-02-15 02:08:01,515 INFO L226 Difference]: Without dead ends: 327 [2022-02-15 02:08:01,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:08:01,516 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:01,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 73 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-15 02:08:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 307. [2022-02-15 02:08:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 295 states have internal predecessors, (345), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 362 transitions. [2022-02-15 02:08:01,754 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 362 transitions. Word has length 64 [2022-02-15 02:08:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:01,754 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 362 transitions. [2022-02-15 02:08:01,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.45) internal successors, (58), 38 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 362 transitions. [2022-02-15 02:08:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:01,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:01,754 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 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 02:08:01,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 02:08:01,755 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1878189759, now seen corresponding path program 92 times [2022-02-15 02:08:01,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:01,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249228916] [2022-02-15 02:08:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:01,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:01,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:01,849 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:01,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:01,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:01,922 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:01,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:02,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:02,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:02,896 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:02,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249228916] [2022-02-15 02:08:02,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249228916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:02,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:02,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:08:02,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220501648] [2022-02-15 02:08:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:08:02,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:08:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:08:02,897 INFO L87 Difference]: Start difference. First operand 307 states and 362 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:03,913 INFO L93 Difference]: Finished difference Result 548 states and 642 transitions. [2022-02-15 02:08:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:08:03,913 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:03,914 INFO L225 Difference]: With dead ends: 548 [2022-02-15 02:08:03,914 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:08:03,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:08:03,914 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:03,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 72 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:08:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 310. [2022-02-15 02:08:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:04,169 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:04,169 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:04,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:04,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:04,170 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 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 02:08:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 02:08:04,170 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1397109501, now seen corresponding path program 93 times [2022-02-15 02:08:04,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:04,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995148211] [2022-02-15 02:08:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:04,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:04,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:04,234 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:04,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:04,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:04,295 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:05,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:05,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995148211] [2022-02-15 02:08:05,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995148211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:05,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:05,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:08:05,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98548695] [2022-02-15 02:08:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:05,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:08:05,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:08:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:08:05,308 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:06,391 INFO L93 Difference]: Finished difference Result 551 states and 645 transitions. [2022-02-15 02:08:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:08:06,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:06,392 INFO L225 Difference]: With dead ends: 551 [2022-02-15 02:08:06,392 INFO L226 Difference]: Without dead ends: 365 [2022-02-15 02:08:06,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:08:06,393 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:06,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-15 02:08:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 310. [2022-02-15 02:08:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:06,657 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:06,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:06,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:06,658 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 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 02:08:06,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 02:08:06,658 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1044021119, now seen corresponding path program 94 times [2022-02-15 02:08:06,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:06,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114057805] [2022-02-15 02:08:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:06,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:06,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:06,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:06,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:06,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:06,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:06,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:06,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:07,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:07,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114057805] [2022-02-15 02:08:07,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114057805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:07,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:07,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:08:07,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023691389] [2022-02-15 02:08:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:08:07,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:08:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:08:07,866 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:09,058 INFO L93 Difference]: Finished difference Result 548 states and 642 transitions. [2022-02-15 02:08:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:08:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:09,059 INFO L225 Difference]: With dead ends: 548 [2022-02-15 02:08:09,059 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:08:09,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:08:09,060 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:09,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:08:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 310. [2022-02-15 02:08:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:09,350 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:09,350 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:09,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:09,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:09,351 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 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 02:08:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 02:08:09,351 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1005366723, now seen corresponding path program 95 times [2022-02-15 02:08:09,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:09,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646181163] [2022-02-15 02:08:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:09,384 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:09,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:09,424 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:09,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:09,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:09,503 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:09,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:09,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:09,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:10,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:10,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646181163] [2022-02-15 02:08:10,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [646181163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:10,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:10,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:08:10,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001893921] [2022-02-15 02:08:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:08:10,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:08:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:08:10,519 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:11,575 INFO L93 Difference]: Finished difference Result 545 states and 639 transitions. [2022-02-15 02:08:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:08:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:11,581 INFO L225 Difference]: With dead ends: 545 [2022-02-15 02:08:11,581 INFO L226 Difference]: Without dead ends: 359 [2022-02-15 02:08:11,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:08:11,581 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:11,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 60 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-15 02:08:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2022-02-15 02:08:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:11,864 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:11,865 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:11,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:11,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:11,865 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 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 02:08:11,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 02:08:11,865 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash -581720001, now seen corresponding path program 96 times [2022-02-15 02:08:11,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:11,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338538062] [2022-02-15 02:08:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:11,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:11,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:11,956 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:11,999 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:12,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:12,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:12,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:12,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:13,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:13,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338538062] [2022-02-15 02:08:13,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338538062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:13,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:13,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:08:13,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62621159] [2022-02-15 02:08:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:13,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:08:13,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:08:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:08:13,048 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:14,143 INFO L93 Difference]: Finished difference Result 542 states and 636 transitions. [2022-02-15 02:08:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:08:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:14,144 INFO L225 Difference]: With dead ends: 542 [2022-02-15 02:08:14,144 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:08:14,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:08:14,144 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:14,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:08:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 310. [2022-02-15 02:08:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:14,437 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:14,437 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:14,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:14,437 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 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 02:08:14,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 02:08:14,437 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1611079299, now seen corresponding path program 97 times [2022-02-15 02:08:14,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:14,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178243020] [2022-02-15 02:08:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:14,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:14,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:14,526 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:14,570 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:14,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:14,612 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:14,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:14,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:15,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:15,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178243020] [2022-02-15 02:08:15,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [178243020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:15,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:15,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:08:15,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347203993] [2022-02-15 02:08:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:15,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:08:15,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:08:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:08:15,640 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:16,880 INFO L93 Difference]: Finished difference Result 539 states and 633 transitions. [2022-02-15 02:08:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:08:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:16,881 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:08:16,881 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 02:08:16,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:08:16,881 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:16,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 75 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 02:08:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2022-02-15 02:08:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:17,182 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:17,182 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:17,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:17,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:17,182 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 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 02:08:17,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 02:08:17,182 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1839882495, now seen corresponding path program 98 times [2022-02-15 02:08:17,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:17,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658791228] [2022-02-15 02:08:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:17,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:17,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:17,258 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:17,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:17,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:17,321 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:17,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:18,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:18,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658791228] [2022-02-15 02:08:18,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658791228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:18,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:18,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:08:18,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374536295] [2022-02-15 02:08:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:18,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:08:18,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:08:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:08:18,357 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:19,450 INFO L93 Difference]: Finished difference Result 536 states and 630 transitions. [2022-02-15 02:08:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:08:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:19,451 INFO L225 Difference]: With dead ends: 536 [2022-02-15 02:08:19,451 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:08:19,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:08:19,452 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:19,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 60 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:08:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 310. [2022-02-15 02:08:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:19,748 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:19,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:19,748 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 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 02:08:19,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 02:08:19,749 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2114642109, now seen corresponding path program 99 times [2022-02-15 02:08:19,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:19,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189157835] [2022-02-15 02:08:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:19,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:19,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:19,834 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:19,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:19,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:19,917 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:20,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:20,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:21,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:21,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189157835] [2022-02-15 02:08:21,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [189157835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:21,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:21,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:08:21,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744084152] [2022-02-15 02:08:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:21,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:08:21,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:08:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:08:21,018 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:22,243 INFO L93 Difference]: Finished difference Result 533 states and 627 transitions. [2022-02-15 02:08:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:08:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:22,244 INFO L225 Difference]: With dead ends: 533 [2022-02-15 02:08:22,244 INFO L226 Difference]: Without dead ends: 347 [2022-02-15 02:08:22,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:08:22,245 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:22,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-15 02:08:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 310. [2022-02-15 02:08:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:22,534 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:22,534 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:22,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:22,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:22,535 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 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 02:08:22,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 02:08:22,535 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -794121793, now seen corresponding path program 100 times [2022-02-15 02:08:22,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:22,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201276102] [2022-02-15 02:08:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:22,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:22,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:22,613 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:22,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:22,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:22,675 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:22,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:22,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:23,784 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:23,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201276102] [2022-02-15 02:08:23,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [201276102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:23,784 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:23,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:08:23,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051479065] [2022-02-15 02:08:23,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:23,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:08:23,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:23,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:08:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:08:23,785 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:25,112 INFO L93 Difference]: Finished difference Result 530 states and 624 transitions. [2022-02-15 02:08:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:08:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:25,113 INFO L225 Difference]: With dead ends: 530 [2022-02-15 02:08:25,113 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:08:25,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:08:25,113 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:25,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 83 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:08:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:08:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 310. [2022-02-15 02:08:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:25,405 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:25,406 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:25,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 35 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:25,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:25,406 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 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 02:08:25,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 02:08:25,406 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash -732082179, now seen corresponding path program 101 times [2022-02-15 02:08:25,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:25,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747542606] [2022-02-15 02:08:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:25,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:25,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:25,481 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:25,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:25,555 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:25,555 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:26,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:26,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747542606] [2022-02-15 02:08:26,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [747542606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:26,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:26,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:08:26,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368888612] [2022-02-15 02:08:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:26,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:08:26,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:08:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:08:26,640 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:27,810 INFO L93 Difference]: Finished difference Result 527 states and 621 transitions. [2022-02-15 02:08:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:08:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:27,811 INFO L225 Difference]: With dead ends: 527 [2022-02-15 02:08:27,811 INFO L226 Difference]: Without dead ends: 341 [2022-02-15 02:08:27,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:08:27,812 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:27,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-15 02:08:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 310. [2022-02-15 02:08:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:28,121 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 36 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:28,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:28,121 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 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 02:08:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 02:08:28,121 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1757446783, now seen corresponding path program 102 times [2022-02-15 02:08:28,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:28,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908286807] [2022-02-15 02:08:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:28,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,194 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:28,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,275 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:28,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:28,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:29,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:29,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908286807] [2022-02-15 02:08:29,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908286807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:29,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:29,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:08:29,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997474823] [2022-02-15 02:08:29,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:08:29,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:08:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:08:29,360 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:30,444 INFO L93 Difference]: Finished difference Result 524 states and 618 transitions. [2022-02-15 02:08:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:08:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:30,445 INFO L225 Difference]: With dead ends: 524 [2022-02-15 02:08:30,445 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:08:30,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:08:30,445 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:30,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:08:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 310. [2022-02-15 02:08:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:30,725 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:30,725 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:30,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:30,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:30,726 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 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 02:08:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 02:08:30,726 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 939798333, now seen corresponding path program 103 times [2022-02-15 02:08:30,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:30,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510883846] [2022-02-15 02:08:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:30,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:30,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:30,796 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:30,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:30,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:30,879 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:30,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:31,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:31,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510883846] [2022-02-15 02:08:31,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510883846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:31,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:31,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:08:31,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979095630] [2022-02-15 02:08:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:31,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:08:31,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:08:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:08:31,979 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 40 states, 40 states have (on average 1.525) internal successors, (61), 38 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:33,051 INFO L93 Difference]: Finished difference Result 521 states and 615 transitions. [2022-02-15 02:08:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:08:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 38 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:33,051 INFO L225 Difference]: With dead ends: 521 [2022-02-15 02:08:33,052 INFO L226 Difference]: Without dead ends: 335 [2022-02-15 02:08:33,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:08:33,052 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:33,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 70 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-15 02:08:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 310. [2022-02-15 02:08:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:33,342 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:33,342 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:33,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 38 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:33,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:33,342 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 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 02:08:33,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 02:08:33,343 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash -648549569, now seen corresponding path program 104 times [2022-02-15 02:08:33,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:33,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648579238] [2022-02-15 02:08:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:33,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:33,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:33,412 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:33,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:33,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:33,482 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:33,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:33,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:33,586 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 02:08:34,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:34,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648579238] [2022-02-15 02:08:34,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648579238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:34,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:34,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:08:34,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513741932] [2022-02-15 02:08:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:08:34,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:08:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:08:34,588 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 39 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:35,784 INFO L93 Difference]: Finished difference Result 519 states and 613 transitions. [2022-02-15 02:08:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:08:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 39 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:35,785 INFO L225 Difference]: With dead ends: 519 [2022-02-15 02:08:35,785 INFO L226 Difference]: Without dead ends: 333 [2022-02-15 02:08:35,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:08:35,785 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:35,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 92 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-15 02:08:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 310. [2022-02-15 02:08:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 295 states have (on average 1.1796610169491526) internal successors, (348), 298 states have internal predecessors, (348), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2022-02-15 02:08:36,077 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 67 [2022-02-15 02:08:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:36,077 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2022-02-15 02:08:36,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 39 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2022-02-15 02:08:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:08:36,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:36,077 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 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 02:08:36,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 02:08:36,077 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1659666819, now seen corresponding path program 105 times [2022-02-15 02:08:36,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:36,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998158962] [2022-02-15 02:08:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:36,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:36,118 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:36,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:36,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:36,204 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:36,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:37,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:37,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998158962] [2022-02-15 02:08:37,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998158962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:37,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:37,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:08:37,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360580852] [2022-02-15 02:08:37,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:08:37,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:08:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:08:37,355 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:38,441 INFO L93 Difference]: Finished difference Result 530 states and 628 transitions. [2022-02-15 02:08:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:08:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:08:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:38,442 INFO L225 Difference]: With dead ends: 530 [2022-02-15 02:08:38,442 INFO L226 Difference]: Without dead ends: 333 [2022-02-15 02:08:38,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:08:38,443 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 65 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:08:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-15 02:08:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 313. [2022-02-15 02:08:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 298 states have (on average 1.1812080536912752) internal successors, (352), 301 states have internal predecessors, (352), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 369 transitions. [2022-02-15 02:08:38,736 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 369 transitions. Word has length 67 [2022-02-15 02:08:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:38,736 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 369 transitions. [2022-02-15 02:08:38,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 40 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 369 transitions. [2022-02-15 02:08:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:08:38,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:38,737 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 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] [2022-02-15 02:08:38,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 02:08:38,737 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash 420722915, now seen corresponding path program 6 times [2022-02-15 02:08:38,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:38,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192188256] [2022-02-15 02:08:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:38,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:38,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:38,811 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:38,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:39,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:39,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192188256] [2022-02-15 02:08:39,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [192188256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:39,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:39,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:08:39,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541186324] [2022-02-15 02:08:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:39,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:08:39,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:08:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:08:39,038 INFO L87 Difference]: Start difference. First operand 313 states and 369 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:39,557 INFO L93 Difference]: Finished difference Result 569 states and 677 transitions. [2022-02-15 02:08:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:08:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-15 02:08:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:39,557 INFO L225 Difference]: With dead ends: 569 [2022-02-15 02:08:39,557 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 02:08:39,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:08:39,558 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:39,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:08:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 02:08:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 340. [2022-02-15 02:08:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 325 states have (on average 1.1753846153846155) internal successors, (382), 328 states have internal predecessors, (382), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 399 transitions. [2022-02-15 02:08:39,844 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 399 transitions. Word has length 69 [2022-02-15 02:08:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:39,844 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 399 transitions. [2022-02-15 02:08:39,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 399 transitions. [2022-02-15 02:08:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:39,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:39,845 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 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 02:08:39,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 02:08:39,845 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -899647012, now seen corresponding path program 106 times [2022-02-15 02:08:39,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:39,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993812869] [2022-02-15 02:08:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:39,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:39,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:39,916 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:39,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:39,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:39,985 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:40,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:41,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:41,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993812869] [2022-02-15 02:08:41,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993812869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:41,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:41,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:08:41,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112030745] [2022-02-15 02:08:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:41,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:08:41,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:08:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:08:41,087 INFO L87 Difference]: Start difference. First operand 340 states and 399 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:42,319 INFO L93 Difference]: Finished difference Result 614 states and 715 transitions. [2022-02-15 02:08:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:08:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:42,320 INFO L225 Difference]: With dead ends: 614 [2022-02-15 02:08:42,320 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 02:08:42,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:08:42,321 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:42,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 02:08:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2022-02-15 02:08:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:42,673 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:42,673 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:42,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 28 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:42,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:42,673 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 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 02:08:42,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 02:08:42,673 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash -455746338, now seen corresponding path program 107 times [2022-02-15 02:08:42,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:42,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111181597] [2022-02-15 02:08:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:42,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:42,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,817 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:42,928 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 02:08:43,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:43,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111181597] [2022-02-15 02:08:43,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111181597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:43,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:43,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:08:43,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538450942] [2022-02-15 02:08:43,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:43,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:08:43,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:08:43,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:08:43,866 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:45,138 INFO L93 Difference]: Finished difference Result 617 states and 718 transitions. [2022-02-15 02:08:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:08:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:45,139 INFO L225 Difference]: With dead ends: 617 [2022-02-15 02:08:45,139 INFO L226 Difference]: Without dead ends: 404 [2022-02-15 02:08:45,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:08:45,140 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:45,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-15 02:08:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 343. [2022-02-15 02:08:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:45,495 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:45,496 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:45,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:45,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:45,496 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 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 02:08:45,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 02:08:45,496 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash -936826596, now seen corresponding path program 108 times [2022-02-15 02:08:45,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:45,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871803234] [2022-02-15 02:08:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:45,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,570 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,570 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:45,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,655 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:45,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:46,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:46,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871803234] [2022-02-15 02:08:46,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871803234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:46,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:46,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:08:46,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888868053] [2022-02-15 02:08:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:46,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:08:46,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:08:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:08:46,721 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:48,040 INFO L93 Difference]: Finished difference Result 614 states and 715 transitions. [2022-02-15 02:08:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:08:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:48,041 INFO L225 Difference]: With dead ends: 614 [2022-02-15 02:08:48,041 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 02:08:48,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:08:48,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:48,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 62 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 02:08:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2022-02-15 02:08:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:48,402 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:48,402 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:48,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:48,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:48,402 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 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 02:08:48,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 02:08:48,403 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1289914978, now seen corresponding path program 109 times [2022-02-15 02:08:48,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:48,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57863352] [2022-02-15 02:08:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:48,446 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:48,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:48,486 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:48,517 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:48,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:48,556 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:49,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:49,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57863352] [2022-02-15 02:08:49,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [57863352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:49,648 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:49,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:08:49,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509472587] [2022-02-15 02:08:49,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:49,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:08:49,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:08:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:08:49,649 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:50,979 INFO L93 Difference]: Finished difference Result 611 states and 712 transitions. [2022-02-15 02:08:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:08:50,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:50,980 INFO L225 Difference]: With dead ends: 611 [2022-02-15 02:08:50,981 INFO L226 Difference]: Without dead ends: 398 [2022-02-15 02:08:50,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:08:50,981 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:50,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:08:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-15 02:08:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 343. [2022-02-15 02:08:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:51,386 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:51,386 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:51,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:51,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:51,387 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 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 02:08:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 02:08:51,387 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash 955664476, now seen corresponding path program 110 times [2022-02-15 02:08:51,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:51,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752742198] [2022-02-15 02:08:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:51,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:51,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:51,465 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:51,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:51,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:51,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:51,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:51,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:52,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:52,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752742198] [2022-02-15 02:08:52,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752742198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:52,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:52,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:08:52,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624691974] [2022-02-15 02:08:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:08:52,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:08:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:08:52,608 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:53,932 INFO L93 Difference]: Finished difference Result 608 states and 709 transitions. [2022-02-15 02:08:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:08:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:53,933 INFO L225 Difference]: With dead ends: 608 [2022-02-15 02:08:53,933 INFO L226 Difference]: Without dead ends: 395 [2022-02-15 02:08:53,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:08:53,933 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:53,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 70 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-15 02:08:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 343. [2022-02-15 02:08:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:54,306 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:54,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:54,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:54,307 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 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 02:08:54,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 02:08:54,307 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1379311198, now seen corresponding path program 111 times [2022-02-15 02:08:54,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:54,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697339131] [2022-02-15 02:08:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:54,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:54,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:54,390 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:54,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:54,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:54,502 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:55,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:55,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697339131] [2022-02-15 02:08:55,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697339131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:55,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:55,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:08:55,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700163454] [2022-02-15 02:08:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:55,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:08:55,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:08:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:08:55,591 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:56,927 INFO L93 Difference]: Finished difference Result 605 states and 706 transitions. [2022-02-15 02:08:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:08:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:56,928 INFO L225 Difference]: With dead ends: 605 [2022-02-15 02:08:56,928 INFO L226 Difference]: Without dead ends: 392 [2022-02-15 02:08:56,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:08:56,931 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:56,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 66 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-15 02:08:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 343. [2022-02-15 02:08:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:08:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:08:57,313 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:08:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:08:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:08:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:08:57,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:57,314 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 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 02:08:57,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 02:08:57,314 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash 349951900, now seen corresponding path program 112 times [2022-02-15 02:08:57,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:57,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048316080] [2022-02-15 02:08:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:57,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:57,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:57,380 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:57,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:57,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:57,472 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:57,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:57,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:08:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:58,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:58,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048316080] [2022-02-15 02:08:58,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048316080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:58,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:58,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:08:58,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464391268] [2022-02-15 02:08:58,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:58,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:08:58,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:08:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:08:58,582 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:59,918 INFO L93 Difference]: Finished difference Result 602 states and 703 transitions. [2022-02-15 02:08:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:08:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:08:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:59,919 INFO L225 Difference]: With dead ends: 602 [2022-02-15 02:08:59,919 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 02:08:59,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:08:59,920 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:59,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 66 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:08:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 02:09:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 343. [2022-02-15 02:09:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:00,299 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:00,299 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:00,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:00,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:00,300 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 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 02:09:00,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-15 02:09:00,300 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -494053602, now seen corresponding path program 113 times [2022-02-15 02:09:00,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:00,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030716623] [2022-02-15 02:09:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:00,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,374 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:00,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,444 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:00,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:01,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:01,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030716623] [2022-02-15 02:09:01,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1030716623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:01,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:01,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:09:01,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10168674] [2022-02-15 02:09:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:01,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:09:01,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:09:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:09:01,611 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:02,907 INFO L93 Difference]: Finished difference Result 599 states and 700 transitions. [2022-02-15 02:09:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:09:02,908 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:02,909 INFO L225 Difference]: With dead ends: 599 [2022-02-15 02:09:02,909 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 02:09:02,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:09:02,909 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:02,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 56 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:09:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 02:09:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 343. [2022-02-15 02:09:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:03,310 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:03,310 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:03,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 35 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:03,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:03,311 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 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 02:09:03,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-15 02:09:03,311 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -219293988, now seen corresponding path program 114 times [2022-02-15 02:09:03,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:03,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053170162] [2022-02-15 02:09:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:03,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,377 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:03,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,445 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:03,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:04,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:04,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053170162] [2022-02-15 02:09:04,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053170162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:04,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:04,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:09:04,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146848132] [2022-02-15 02:09:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:04,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:09:04,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:04,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:09:04,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:09:04,577 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:05,861 INFO L93 Difference]: Finished difference Result 596 states and 697 transitions. [2022-02-15 02:09:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:09:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:05,862 INFO L225 Difference]: With dead ends: 596 [2022-02-15 02:09:05,862 INFO L226 Difference]: Without dead ends: 383 [2022-02-15 02:09:05,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:09:05,863 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:05,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 66 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:09:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-15 02:09:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 343. [2022-02-15 02:09:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:06,309 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:06,309 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:06,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 36 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:06,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:06,310 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 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 02:09:06,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-15 02:09:06,310 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1166909406, now seen corresponding path program 115 times [2022-02-15 02:09:06,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:06,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420223353] [2022-02-15 02:09:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:06,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:06,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:06,395 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:06,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:06,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:06,473 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:06,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:06,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:06,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:07,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:07,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420223353] [2022-02-15 02:09:07,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420223353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:07,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:07,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:09:07,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564767520] [2022-02-15 02:09:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:07,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:09:07,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:09:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:09:07,712 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:09,110 INFO L93 Difference]: Finished difference Result 593 states and 694 transitions. [2022-02-15 02:09:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:09:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:09,111 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:09:09,111 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:09:09,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:09:09,112 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:09,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 83 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:09:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:09:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 343. [2022-02-15 02:09:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:09,494 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:09,494 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:09,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 37 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:09,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:09,495 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 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 02:09:09,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-15 02:09:09,495 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1228949020, now seen corresponding path program 116 times [2022-02-15 02:09:09,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:09,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518239467] [2022-02-15 02:09:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:09,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,580 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:09,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,653 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:09,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:10,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:10,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518239467] [2022-02-15 02:09:10,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518239467] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:10,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:10,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:09:10,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362503558] [2022-02-15 02:09:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:10,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:09:10,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:09:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:09:10,830 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:12,131 INFO L93 Difference]: Finished difference Result 590 states and 691 transitions. [2022-02-15 02:09:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:09:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:12,132 INFO L225 Difference]: With dead ends: 590 [2022-02-15 02:09:12,132 INFO L226 Difference]: Without dead ends: 377 [2022-02-15 02:09:12,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:09:12,132 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:12,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 72 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-15 02:09:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 343. [2022-02-15 02:09:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:12,518 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:12,518 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:12,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:12,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:12,519 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 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 02:09:12,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-15 02:09:12,519 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash -576489314, now seen corresponding path program 117 times [2022-02-15 02:09:12,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:12,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822512161] [2022-02-15 02:09:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:12,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:12,592 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:12,593 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:12,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:12,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:12,654 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:12,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:12,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:13,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:13,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822512161] [2022-02-15 02:09:13,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822512161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:13,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:13,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:09:13,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667665828] [2022-02-15 02:09:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:13,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:09:13,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:09:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:09:13,840 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:15,186 INFO L93 Difference]: Finished difference Result 587 states and 688 transitions. [2022-02-15 02:09:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:09:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:15,187 INFO L225 Difference]: With dead ends: 587 [2022-02-15 02:09:15,187 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 02:09:15,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:09:15,187 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:15,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 74 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 02:09:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 343. [2022-02-15 02:09:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:15,570 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:15,571 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:15,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:15,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:15,571 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 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 02:09:15,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-15 02:09:15,571 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1394137764, now seen corresponding path program 118 times [2022-02-15 02:09:15,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:15,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076881921] [2022-02-15 02:09:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:15,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:15,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:15,656 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:15,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:15,739 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:15,739 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:16,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:16,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076881921] [2022-02-15 02:09:16,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076881921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:16,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:16,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:09:16,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536305964] [2022-02-15 02:09:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:16,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:09:16,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:09:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:09:16,951 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 40 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:18,365 INFO L93 Difference]: Finished difference Result 584 states and 685 transitions. [2022-02-15 02:09:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:09:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 40 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:18,366 INFO L225 Difference]: With dead ends: 584 [2022-02-15 02:09:18,366 INFO L226 Difference]: Without dead ends: 371 [2022-02-15 02:09:18,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:09:18,366 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:18,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 74 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:09:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-15 02:09:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 343. [2022-02-15 02:09:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:18,758 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:18,758 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:18,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 40 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:18,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:18,758 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 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 02:09:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-15 02:09:18,759 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1312481630, now seen corresponding path program 119 times [2022-02-15 02:09:18,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:18,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604588212] [2022-02-15 02:09:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:18,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:18,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:18,821 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:18,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:18,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:18,903 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:20,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:20,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604588212] [2022-02-15 02:09:20,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [604588212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:20,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:20,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:09:20,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403716087] [2022-02-15 02:09:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:09:20,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:09:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:09:20,134 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 41 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:21,462 INFO L93 Difference]: Finished difference Result 582 states and 683 transitions. [2022-02-15 02:09:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:09:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 41 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:21,464 INFO L225 Difference]: With dead ends: 582 [2022-02-15 02:09:21,464 INFO L226 Difference]: Without dead ends: 369 [2022-02-15 02:09:21,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:09:21,464 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:21,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 62 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-15 02:09:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 343. [2022-02-15 02:09:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 328 states have (on average 1.173780487804878) internal successors, (385), 331 states have internal predecessors, (385), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 402 transitions. [2022-02-15 02:09:21,875 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 402 transitions. Word has length 70 [2022-02-15 02:09:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:21,875 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 402 transitions. [2022-02-15 02:09:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 41 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 402 transitions. [2022-02-15 02:09:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:09:21,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:21,876 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 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 02:09:21,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-15 02:09:21,876 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 301364380, now seen corresponding path program 120 times [2022-02-15 02:09:21,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:21,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295786726] [2022-02-15 02:09:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:21,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:21,919 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:21,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:21,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:21,996 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:22,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:23,237 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:23,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295786726] [2022-02-15 02:09:23,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [295786726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:23,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:23,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:09:23,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328408947] [2022-02-15 02:09:23,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:09:23,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:09:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:09:23,238 INFO L87 Difference]: Start difference. First operand 343 states and 402 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 42 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:24,573 INFO L93 Difference]: Finished difference Result 593 states and 698 transitions. [2022-02-15 02:09:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:09:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 42 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:09:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:24,575 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:09:24,575 INFO L226 Difference]: Without dead ends: 369 [2022-02-15 02:09:24,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:09:24,575 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:24,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 70 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:09:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-15 02:09:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 346. [2022-02-15 02:09:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 334 states have internal predecessors, (389), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 406 transitions. [2022-02-15 02:09:24,973 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 406 transitions. Word has length 70 [2022-02-15 02:09:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:24,973 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 406 transitions. [2022-02-15 02:09:24,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 42 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 406 transitions. [2022-02-15 02:09:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:24,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:24,973 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 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 02:09:24,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-15 02:09:24,973 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash -5032545, now seen corresponding path program 121 times [2022-02-15 02:09:24,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:24,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307301305] [2022-02-15 02:09:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:25,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:25,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:25,052 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:25,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:25,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:25,124 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:26,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:26,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307301305] [2022-02-15 02:09:26,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [307301305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:26,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:26,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:09:26,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258370597] [2022-02-15 02:09:26,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:26,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:09:26,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:09:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:09:26,253 INFO L87 Difference]: Start difference. First operand 346 states and 406 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:27,759 INFO L93 Difference]: Finished difference Result 623 states and 725 transitions. [2022-02-15 02:09:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:09:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:27,760 INFO L225 Difference]: With dead ends: 623 [2022-02-15 02:09:27,760 INFO L226 Difference]: Without dead ends: 410 [2022-02-15 02:09:27,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:09:27,760 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:27,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 70 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:09:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-15 02:09:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 349. [2022-02-15 02:09:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:28,176 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:28,176 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:28,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:28,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:28,176 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 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 02:09:28,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-15 02:09:28,177 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 35642205, now seen corresponding path program 122 times [2022-02-15 02:09:28,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:28,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524116738] [2022-02-15 02:09:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:28,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:28,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:28,265 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:28,308 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:28,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:28,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:29,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:29,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524116738] [2022-02-15 02:09:29,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [524116738] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:29,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:29,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:09:29,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467614084] [2022-02-15 02:09:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:29,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:09:29,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:09:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:09:29,455 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:30,953 INFO L93 Difference]: Finished difference Result 626 states and 728 transitions. [2022-02-15 02:09:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:09:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:30,954 INFO L225 Difference]: With dead ends: 626 [2022-02-15 02:09:30,954 INFO L226 Difference]: Without dead ends: 413 [2022-02-15 02:09:30,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:09:30,955 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:30,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:09:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-15 02:09:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 349. [2022-02-15 02:09:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:31,390 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 30 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:31,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:31,390 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 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 02:09:31,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-15 02:09:31,391 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash 479542879, now seen corresponding path program 123 times [2022-02-15 02:09:31,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:31,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484270422] [2022-02-15 02:09:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:31,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:31,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:31,475 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:31,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:31,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:31,546 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:31,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:32,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:32,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484270422] [2022-02-15 02:09:32,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484270422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:32,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:32,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:09:32,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621121025] [2022-02-15 02:09:32,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:09:32,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:09:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:09:32,694 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:34,318 INFO L93 Difference]: Finished difference Result 623 states and 725 transitions. [2022-02-15 02:09:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:09:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:34,319 INFO L225 Difference]: With dead ends: 623 [2022-02-15 02:09:34,319 INFO L226 Difference]: Without dead ends: 410 [2022-02-15 02:09:34,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:09:34,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:34,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 79 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-15 02:09:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 349. [2022-02-15 02:09:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:34,768 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:34,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:34,769 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 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 02:09:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-15 02:09:34,769 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1537379, now seen corresponding path program 124 times [2022-02-15 02:09:34,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:34,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036636512] [2022-02-15 02:09:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:34,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:34,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:34,840 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:34,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:34,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:34,910 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:34,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:35,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:36,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:36,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036636512] [2022-02-15 02:09:36,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036636512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:36,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:36,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:09:36,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571897613] [2022-02-15 02:09:36,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:09:36,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:09:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:09:36,106 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:37,655 INFO L93 Difference]: Finished difference Result 620 states and 722 transitions. [2022-02-15 02:09:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:09:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:37,656 INFO L225 Difference]: With dead ends: 620 [2022-02-15 02:09:37,656 INFO L226 Difference]: Without dead ends: 407 [2022-02-15 02:09:37,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:09:37,656 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:37,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:09:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-15 02:09:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 349. [2022-02-15 02:09:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:38,115 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:38,115 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:38,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:38,115 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 12, 5, 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 02:09:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-15 02:09:38,116 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -354625761, now seen corresponding path program 125 times [2022-02-15 02:09:38,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:38,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615022808] [2022-02-15 02:09:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:38,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:38,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:38,192 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:38,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:38,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:38,254 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:38,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:39,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:39,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615022808] [2022-02-15 02:09:39,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [615022808] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:39,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:39,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:09:39,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604753047] [2022-02-15 02:09:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:39,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:09:39,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:09:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:09:39,445 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:41,158 INFO L93 Difference]: Finished difference Result 617 states and 719 transitions. [2022-02-15 02:09:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:09:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:41,159 INFO L225 Difference]: With dead ends: 617 [2022-02-15 02:09:41,160 INFO L226 Difference]: Without dead ends: 404 [2022-02-15 02:09:41,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:09:41,160 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:41,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 97 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:09:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-15 02:09:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 349. [2022-02-15 02:09:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:41,628 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 33 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:41,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:41,629 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 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 02:09:41,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-15 02:09:41,629 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1890953693, now seen corresponding path program 126 times [2022-02-15 02:09:41,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:41,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576114666] [2022-02-15 02:09:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:41,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,713 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:41,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,774 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:41,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:42,948 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:42,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576114666] [2022-02-15 02:09:42,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576114666] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:42,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:42,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:09:42,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891952095] [2022-02-15 02:09:42,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:42,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:09:42,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:09:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:09:42,949 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:44,614 INFO L93 Difference]: Finished difference Result 614 states and 716 transitions. [2022-02-15 02:09:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:09:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:44,615 INFO L225 Difference]: With dead ends: 614 [2022-02-15 02:09:44,616 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 02:09:44,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:09:44,616 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:44,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 88 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 02:09:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 349. [2022-02-15 02:09:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:45,115 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:45,116 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:45,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:45,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:45,116 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 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 02:09:45,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-15 02:09:45,116 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1980366881, now seen corresponding path program 127 times [2022-02-15 02:09:45,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:45,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419419502] [2022-02-15 02:09:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:45,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:45,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:45,189 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:45,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:45,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:45,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:45,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:45,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:46,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:46,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419419502] [2022-02-15 02:09:46,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1419419502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:46,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:46,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:09:46,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360677714] [2022-02-15 02:09:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:46,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:09:46,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:09:46,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:09:46,489 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:48,064 INFO L93 Difference]: Finished difference Result 611 states and 713 transitions. [2022-02-15 02:09:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:09:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:48,065 INFO L225 Difference]: With dead ends: 611 [2022-02-15 02:09:48,065 INFO L226 Difference]: Without dead ends: 398 [2022-02-15 02:09:48,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:09:48,065 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:48,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 68 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-15 02:09:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 349. [2022-02-15 02:09:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:48,544 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:48,544 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:48,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:48,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:48,544 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 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 02:09:48,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-15 02:09:48,545 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1285241117, now seen corresponding path program 128 times [2022-02-15 02:09:48,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:48,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131319000] [2022-02-15 02:09:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:48,577 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,607 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:48,659 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,699 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:48,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:48,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:49,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:49,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131319000] [2022-02-15 02:09:49,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131319000] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:49,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:49,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:09:49,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101898027] [2022-02-15 02:09:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:49,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:09:49,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:09:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:09:49,884 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:51,516 INFO L93 Difference]: Finished difference Result 608 states and 710 transitions. [2022-02-15 02:09:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:09:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:51,517 INFO L225 Difference]: With dead ends: 608 [2022-02-15 02:09:51,517 INFO L226 Difference]: Without dead ends: 395 [2022-02-15 02:09:51,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:09:51,517 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:51,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 76 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:09:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-15 02:09:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 349. [2022-02-15 02:09:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:52,008 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:52,009 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:52,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 36 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:52,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:52,009 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 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 02:09:52,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-15 02:09:52,009 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 441235615, now seen corresponding path program 129 times [2022-02-15 02:09:52,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:52,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857928837] [2022-02-15 02:09:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:52,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:52,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:52,093 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:52,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:52,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:52,175 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:52,281 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 02:09:53,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:53,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857928837] [2022-02-15 02:09:53,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857928837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:53,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:53,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:09:53,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646874192] [2022-02-15 02:09:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:53,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:09:53,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:09:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:09:53,373 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:54,971 INFO L93 Difference]: Finished difference Result 605 states and 707 transitions. [2022-02-15 02:09:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:09:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:54,972 INFO L225 Difference]: With dead ends: 605 [2022-02-15 02:09:54,972 INFO L226 Difference]: Without dead ends: 392 [2022-02-15 02:09:54,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:09:54,972 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:54,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-15 02:09:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 349. [2022-02-15 02:09:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:55,495 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:55,495 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:55,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:55,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:55,496 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 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 02:09:55,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-15 02:09:55,496 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash 715995229, now seen corresponding path program 130 times [2022-02-15 02:09:55,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:55,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749302645] [2022-02-15 02:09:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:55,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:55,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:55,582 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:55,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:55,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:55,653 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:55,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:56,893 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:56,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749302645] [2022-02-15 02:09:56,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749302645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:56,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:56,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:09:56,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735212544] [2022-02-15 02:09:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:56,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:09:56,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:09:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:09:56,894 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:58,430 INFO L93 Difference]: Finished difference Result 602 states and 704 transitions. [2022-02-15 02:09:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:09:58,430 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:09:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:58,431 INFO L225 Difference]: With dead ends: 602 [2022-02-15 02:09:58,431 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 02:09:58,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:09:58,431 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:58,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 86 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:09:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 02:09:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 349. [2022-02-15 02:09:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:09:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:09:58,898 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:09:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:09:58,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 38 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:09:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:09:58,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:58,899 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 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 02:09:58,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-15 02:09:58,899 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2102198623, now seen corresponding path program 131 times [2022-02-15 02:09:58,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:58,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116190928] [2022-02-15 02:09:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:58,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:58,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:58,972 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:59,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:59,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:59,058 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:09:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:00,281 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:00,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116190928] [2022-02-15 02:10:00,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116190928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:00,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:00,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:10:00,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126914679] [2022-02-15 02:10:00,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:00,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:10:00,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:10:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:10:00,283 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:01,928 INFO L93 Difference]: Finished difference Result 599 states and 701 transitions. [2022-02-15 02:10:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:10:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:01,929 INFO L225 Difference]: With dead ends: 599 [2022-02-15 02:10:01,929 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 02:10:01,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:10:01,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:01,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 75 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:10:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 02:10:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2022-02-15 02:10:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:10:02,428 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:10:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:10:02,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 39 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:10:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:10:02,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:02,429 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 12, 5, 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 02:10:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-15 02:10:02,429 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2130729059, now seen corresponding path program 132 times [2022-02-15 02:10:02,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:02,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914732324] [2022-02-15 02:10:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:02,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:02,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:02,513 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:02,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:02,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:02,584 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:03,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914732324] [2022-02-15 02:10:03,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [914732324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:03,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:03,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:10:03,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321945424] [2022-02-15 02:10:03,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:10:03,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:10:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:10:03,856 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:05,442 INFO L93 Difference]: Finished difference Result 596 states and 698 transitions. [2022-02-15 02:10:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:10:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:05,443 INFO L225 Difference]: With dead ends: 596 [2022-02-15 02:10:05,443 INFO L226 Difference]: Without dead ends: 383 [2022-02-15 02:10:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:10:05,444 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:05,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 70 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:10:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-15 02:10:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 349. [2022-02-15 02:10:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:10:05,961 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:10:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:05,961 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:10:05,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 40 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:10:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:10:05,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:05,962 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 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 02:10:05,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-15 02:10:05,962 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 358799903, now seen corresponding path program 133 times [2022-02-15 02:10:05,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:05,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727092626] [2022-02-15 02:10:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:05,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:06,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:06,035 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:06,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:06,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:06,107 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:07,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:07,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727092626] [2022-02-15 02:10:07,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [727092626] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:07,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:07,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:10:07,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796569246] [2022-02-15 02:10:07,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:07,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:10:07,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:10:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:10:07,398 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:08,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:08,851 INFO L93 Difference]: Finished difference Result 593 states and 695 transitions. [2022-02-15 02:10:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:10:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:08,852 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:10:08,852 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:10:08,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:10:08,852 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:08,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 70 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:10:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 349. [2022-02-15 02:10:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:10:09,346 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:10:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:09,346 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:10:09,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:10:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:10:09,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:09,346 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 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 02:10:09,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-15 02:10:09,346 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -458848547, now seen corresponding path program 134 times [2022-02-15 02:10:09,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:09,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474662277] [2022-02-15 02:10:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:09,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:09,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:09,418 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:09,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:09,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:09,499 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:09,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:10,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:10,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474662277] [2022-02-15 02:10:10,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [474662277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:10,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:10,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:10:10,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885074796] [2022-02-15 02:10:10,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:10,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:10:10,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:10:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:10:10,832 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 42 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:12,260 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-02-15 02:10:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:10:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 42 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:12,261 INFO L225 Difference]: With dead ends: 590 [2022-02-15 02:10:12,261 INFO L226 Difference]: Without dead ends: 377 [2022-02-15 02:10:12,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:10:12,261 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:12,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 58 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-15 02:10:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 349. [2022-02-15 02:10:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:10:12,813 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:10:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:12,813 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:10:12,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 42 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:10:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:10:12,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:12,814 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 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 02:10:12,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-02-15 02:10:12,814 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2047196449, now seen corresponding path program 135 times [2022-02-15 02:10:12,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:12,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147212724] [2022-02-15 02:10:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:12,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:12,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:12,891 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:12,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:12,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:12,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:12,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:14,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:14,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147212724] [2022-02-15 02:10:14,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [147212724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:14,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:14,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:10:14,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503339591] [2022-02-15 02:10:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:14,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:10:14,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:10:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:10:14,324 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 43 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:15,861 INFO L93 Difference]: Finished difference Result 588 states and 690 transitions. [2022-02-15 02:10:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:10:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 43 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:15,862 INFO L225 Difference]: With dead ends: 588 [2022-02-15 02:10:15,862 INFO L226 Difference]: Without dead ends: 375 [2022-02-15 02:10:15,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:10:15,863 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:15,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 56 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:10:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-15 02:10:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2022-02-15 02:10:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 334 states have (on average 1.1736526946107784) internal successors, (392), 337 states have internal predecessors, (392), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 409 transitions. [2022-02-15 02:10:16,323 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 409 transitions. Word has length 73 [2022-02-15 02:10:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:16,323 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 409 transitions. [2022-02-15 02:10:16,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 43 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 409 transitions. [2022-02-15 02:10:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:10:16,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:16,324 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 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 02:10:16,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-02-15 02:10:16,324 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1236653597, now seen corresponding path program 136 times [2022-02-15 02:10:16,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:16,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229429096] [2022-02-15 02:10:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:16,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:16,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:16,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:16,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:16,433 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:16,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:16,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:17,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:17,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229429096] [2022-02-15 02:10:17,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229429096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:17,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:17,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:10:17,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122432843] [2022-02-15 02:10:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:17,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:10:17,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:10:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:10:17,744 INFO L87 Difference]: Start difference. First operand 349 states and 409 transitions. Second operand has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:19,408 INFO L93 Difference]: Finished difference Result 599 states and 705 transitions. [2022-02-15 02:10:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:10:19,409 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:10:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:19,411 INFO L225 Difference]: With dead ends: 599 [2022-02-15 02:10:19,411 INFO L226 Difference]: Without dead ends: 375 [2022-02-15 02:10:19,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:10:19,412 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:19,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 105 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:10:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-15 02:10:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2022-02-15 02:10:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 337 states have (on average 1.175074183976261) internal successors, (396), 340 states have internal predecessors, (396), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 413 transitions. [2022-02-15 02:10:19,902 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 413 transitions. Word has length 73 [2022-02-15 02:10:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:19,903 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 413 transitions. [2022-02-15 02:10:19,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 413 transitions. [2022-02-15 02:10:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 02:10:19,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:19,903 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2022-02-15 02:10:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-02-15 02:10:19,903 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash -482247245, now seen corresponding path program 7 times [2022-02-15 02:10:19,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:19,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788638960] [2022-02-15 02:10:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:19,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:19,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:19,976 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:20,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:20,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:20,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:20,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788638960] [2022-02-15 02:10:20,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788638960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:20,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:20,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:10:20,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131294188] [2022-02-15 02:10:20,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:20,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:10:20,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:10:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:10:20,265 INFO L87 Difference]: Start difference. First operand 352 states and 413 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:21,122 INFO L93 Difference]: Finished difference Result 638 states and 754 transitions. [2022-02-15 02:10:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:10:21,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-02-15 02:10:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:21,126 INFO L225 Difference]: With dead ends: 638 [2022-02-15 02:10:21,126 INFO L226 Difference]: Without dead ends: 416 [2022-02-15 02:10:21,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:10:21,127 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:21,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 31 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:10:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-15 02:10:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 379. [2022-02-15 02:10:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 364 states have (on average 1.1703296703296704) internal successors, (426), 367 states have internal predecessors, (426), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 443 transitions. [2022-02-15 02:10:21,612 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 443 transitions. Word has length 75 [2022-02-15 02:10:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:21,613 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 443 transitions. [2022-02-15 02:10:21,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 443 transitions. [2022-02-15 02:10:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:21,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:21,613 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 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 02:10:21,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-02-15 02:10:21,613 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1182482172, now seen corresponding path program 137 times [2022-02-15 02:10:21,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:21,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237478682] [2022-02-15 02:10:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:21,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:21,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:21,685 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:21,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:21,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:21,767 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:21,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:21,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:22,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:22,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237478682] [2022-02-15 02:10:22,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [237478682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:22,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:22,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:10:22,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719998933] [2022-02-15 02:10:22,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:22,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:10:22,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:10:22,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:10:22,978 INFO L87 Difference]: Start difference. First operand 379 states and 443 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:24,874 INFO L93 Difference]: Finished difference Result 689 states and 798 transitions. [2022-02-15 02:10:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:10:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:24,875 INFO L225 Difference]: With dead ends: 689 [2022-02-15 02:10:24,876 INFO L226 Difference]: Without dead ends: 449 [2022-02-15 02:10:24,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:10:24,877 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:24,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 87 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-15 02:10:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 382. [2022-02-15 02:10:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:25,449 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:25,449 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:25,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:25,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:25,450 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 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 02:10:25,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-02-15 02:10:25,450 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1743181950, now seen corresponding path program 138 times [2022-02-15 02:10:25,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:25,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700356242] [2022-02-15 02:10:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:25,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:25,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:25,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:25,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:25,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:25,632 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:25,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:25,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:26,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:26,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700356242] [2022-02-15 02:10:26,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700356242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:26,849 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:26,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:10:26,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785928941] [2022-02-15 02:10:26,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:26,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:10:26,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:10:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:10:26,850 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:28,663 INFO L93 Difference]: Finished difference Result 692 states and 801 transitions. [2022-02-15 02:10:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:10:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:28,664 INFO L225 Difference]: With dead ends: 692 [2022-02-15 02:10:28,664 INFO L226 Difference]: Without dead ends: 452 [2022-02-15 02:10:28,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 32 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:10:28,665 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:28,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 58 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:10:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-15 02:10:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 382. [2022-02-15 02:10:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:29,227 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:29,227 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:29,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 31 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:29,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:29,228 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 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 02:10:29,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-02-15 02:10:29,228 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1783856700, now seen corresponding path program 139 times [2022-02-15 02:10:29,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:29,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128916163] [2022-02-15 02:10:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:29,260 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,300 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:29,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:30,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:30,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128916163] [2022-02-15 02:10:30,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128916163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:30,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:30,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:10:30,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464958606] [2022-02-15 02:10:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:30,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:10:30,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:10:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:10:30,571 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:32,443 INFO L93 Difference]: Finished difference Result 689 states and 798 transitions. [2022-02-15 02:10:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:10:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:32,444 INFO L225 Difference]: With dead ends: 689 [2022-02-15 02:10:32,444 INFO L226 Difference]: Without dead ends: 449 [2022-02-15 02:10:32,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:10:32,445 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:32,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 64 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:10:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-15 02:10:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 382. [2022-02-15 02:10:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:33,021 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:33,021 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:33,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 32 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:33,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:33,022 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 14, 4, 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 02:10:33,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-02-15 02:10:33,022 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2067209922, now seen corresponding path program 140 times [2022-02-15 02:10:33,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:33,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978947876] [2022-02-15 02:10:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:33,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:33,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:33,103 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:33,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:33,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:33,173 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:33,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:34,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:34,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978947876] [2022-02-15 02:10:34,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978947876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:34,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:34,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:10:34,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695801119] [2022-02-15 02:10:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:34,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:10:34,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:10:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:10:34,436 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:36,373 INFO L93 Difference]: Finished difference Result 686 states and 795 transitions. [2022-02-15 02:10:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:10:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:36,374 INFO L225 Difference]: With dead ends: 686 [2022-02-15 02:10:36,374 INFO L226 Difference]: Without dead ends: 446 [2022-02-15 02:10:36,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:10:36,375 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:36,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:10:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-15 02:10:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 382. [2022-02-15 02:10:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:36,976 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:36,976 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:36,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 33 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:36,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:36,977 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 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 02:10:36,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-02-15 02:10:36,977 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1746677116, now seen corresponding path program 141 times [2022-02-15 02:10:36,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:36,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943373881] [2022-02-15 02:10:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:37,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:37,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:37,060 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:37,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:37,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:37,130 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:37,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:37,241 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 02:10:38,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:38,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943373881] [2022-02-15 02:10:38,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [943373881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:38,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:38,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:10:38,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117905871] [2022-02-15 02:10:38,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:38,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:10:38,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:10:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:10:38,371 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:40,245 INFO L93 Difference]: Finished difference Result 683 states and 792 transitions. [2022-02-15 02:10:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:10:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:40,246 INFO L225 Difference]: With dead ends: 683 [2022-02-15 02:10:40,246 INFO L226 Difference]: Without dead ends: 443 [2022-02-15 02:10:40,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:10:40,246 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:40,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 66 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-15 02:10:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 382. [2022-02-15 02:10:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:40,845 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:40,845 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:40,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:40,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:40,846 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 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 02:10:40,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-02-15 02:10:40,846 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1393588734, now seen corresponding path program 142 times [2022-02-15 02:10:40,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:40,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991409171] [2022-02-15 02:10:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:40,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:40,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:40,908 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:40,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:40,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:40,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:42,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:42,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991409171] [2022-02-15 02:10:42,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991409171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:42,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:42,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:10:42,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736160655] [2022-02-15 02:10:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:42,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:10:42,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:10:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:10:42,222 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:44,127 INFO L93 Difference]: Finished difference Result 680 states and 789 transitions. [2022-02-15 02:10:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:10:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:44,128 INFO L225 Difference]: With dead ends: 680 [2022-02-15 02:10:44,128 INFO L226 Difference]: Without dead ends: 440 [2022-02-15 02:10:44,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:10:44,128 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:44,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 87 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-15 02:10:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 382. [2022-02-15 02:10:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:44,735 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:44,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:44,736 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 7, 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 02:10:44,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-02-15 02:10:44,736 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash -655799108, now seen corresponding path program 143 times [2022-02-15 02:10:44,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:44,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548379197] [2022-02-15 02:10:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:44,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:44,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:44,808 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:44,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:44,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:44,889 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:46,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:46,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548379197] [2022-02-15 02:10:46,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [548379197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:46,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:46,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:10:46,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168820259] [2022-02-15 02:10:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:10:46,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:10:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:10:46,126 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:48,030 INFO L93 Difference]: Finished difference Result 677 states and 786 transitions. [2022-02-15 02:10:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:10:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:48,031 INFO L225 Difference]: With dead ends: 677 [2022-02-15 02:10:48,031 INFO L226 Difference]: Without dead ends: 437 [2022-02-15 02:10:48,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:10:48,032 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:48,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 84 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:10:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-15 02:10:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 382. [2022-02-15 02:10:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:48,635 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:48,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:48,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:48,636 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 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 02:10:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-02-15 02:10:48,636 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -232152386, now seen corresponding path program 144 times [2022-02-15 02:10:48,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:48,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376992205] [2022-02-15 02:10:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:48,680 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:48,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:48,718 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:48,764 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:48,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:48,805 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:48,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:48,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:50,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:50,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376992205] [2022-02-15 02:10:50,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376992205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:50,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:50,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:10:50,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921116562] [2022-02-15 02:10:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:50,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:10:50,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:10:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:10:50,066 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:52,000 INFO L93 Difference]: Finished difference Result 674 states and 783 transitions. [2022-02-15 02:10:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:10:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:52,001 INFO L225 Difference]: With dead ends: 674 [2022-02-15 02:10:52,001 INFO L226 Difference]: Without dead ends: 434 [2022-02-15 02:10:52,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:10:52,002 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:52,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 72 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:10:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-15 02:10:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 382. [2022-02-15 02:10:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:52,649 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:52,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:52,650 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 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 02:10:52,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-02-15 02:10:52,650 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1261511684, now seen corresponding path program 145 times [2022-02-15 02:10:52,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:52,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409389164] [2022-02-15 02:10:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:52,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:52,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:52,723 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:52,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:52,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:52,803 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:52,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:52,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:54,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:54,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409389164] [2022-02-15 02:10:54,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409389164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:54,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:54,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:10:54,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355885876] [2022-02-15 02:10:54,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:54,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:10:54,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:10:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:10:54,081 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:56,080 INFO L93 Difference]: Finished difference Result 671 states and 780 transitions. [2022-02-15 02:10:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:10:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:56,080 INFO L225 Difference]: With dead ends: 671 [2022-02-15 02:10:56,081 INFO L226 Difference]: Without dead ends: 431 [2022-02-15 02:10:56,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:10:56,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:56,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 93 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:10:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-15 02:10:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 382. [2022-02-15 02:10:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:10:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:10:56,704 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:10:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:56,704 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:10:56,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 38 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:10:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:10:56,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:56,705 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 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 02:10:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-02-15 02:10:56,705 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2105517186, now seen corresponding path program 146 times [2022-02-15 02:10:56,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:56,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659985277] [2022-02-15 02:10:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:56,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:56,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:56,776 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:56,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:56,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:56,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:56,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:10:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:58,113 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:58,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659985277] [2022-02-15 02:10:58,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659985277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:58,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:58,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:10:58,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371976101] [2022-02-15 02:10:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:58,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:10:58,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:10:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:10:58,114 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:59,949 INFO L93 Difference]: Finished difference Result 668 states and 777 transitions. [2022-02-15 02:10:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:10:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:10:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:59,950 INFO L225 Difference]: With dead ends: 668 [2022-02-15 02:10:59,950 INFO L226 Difference]: Without dead ends: 428 [2022-02-15 02:10:59,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:10:59,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:59,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 70 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2723 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:10:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-15 02:11:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 382. [2022-02-15 02:11:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:00,561 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 39 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:00,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:00,561 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 7, 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 02:11:00,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-02-15 02:11:00,561 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1830757572, now seen corresponding path program 147 times [2022-02-15 02:11:00,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:00,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493378776] [2022-02-15 02:11:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:00,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,635 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:00,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,714 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:00,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:02,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:02,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493378776] [2022-02-15 02:11:02,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [493378776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:02,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:02,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:11:02,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376099426] [2022-02-15 02:11:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:02,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:11:02,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:11:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:11:02,026 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:03,786 INFO L93 Difference]: Finished difference Result 665 states and 774 transitions. [2022-02-15 02:11:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:11:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:03,787 INFO L225 Difference]: With dead ends: 665 [2022-02-15 02:11:03,787 INFO L226 Difference]: Without dead ends: 425 [2022-02-15 02:11:03,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:11:03,788 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:03,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 71 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:11:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-15 02:11:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 382. [2022-02-15 02:11:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:04,407 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:04,407 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:04,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 40 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:04,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:04,407 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 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 02:11:04,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-02-15 02:11:04,407 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash -444554178, now seen corresponding path program 148 times [2022-02-15 02:11:04,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:04,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956423026] [2022-02-15 02:11:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:04,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:04,477 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:04,477 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:04,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:04,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:04,548 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:05,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:05,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956423026] [2022-02-15 02:11:05,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956423026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:05,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:05,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:11:05,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971922592] [2022-02-15 02:11:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:11:05,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:11:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:11:05,866 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:07,696 INFO L93 Difference]: Finished difference Result 662 states and 771 transitions. [2022-02-15 02:11:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:11:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:07,697 INFO L225 Difference]: With dead ends: 662 [2022-02-15 02:11:07,697 INFO L226 Difference]: Without dead ends: 422 [2022-02-15 02:11:07,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:11:07,698 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:07,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 86 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:11:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-15 02:11:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 382. [2022-02-15 02:11:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:08,318 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:08,318 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:08,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 41 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:08,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:08,318 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 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 02:11:08,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-02-15 02:11:08,319 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash -382514564, now seen corresponding path program 149 times [2022-02-15 02:11:08,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:08,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073419490] [2022-02-15 02:11:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:08,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:08,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:08,390 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:08,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:08,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:08,463 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:08,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:08,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:08,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:09,804 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:09,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073419490] [2022-02-15 02:11:09,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073419490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:09,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:09,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:11:09,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264984882] [2022-02-15 02:11:09,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:09,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:11:09,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:09,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:11:09,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:11:09,805 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:11,668 INFO L93 Difference]: Finished difference Result 659 states and 768 transitions. [2022-02-15 02:11:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:11:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:11,669 INFO L225 Difference]: With dead ends: 659 [2022-02-15 02:11:11,669 INFO L226 Difference]: Without dead ends: 419 [2022-02-15 02:11:11,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:11:11,670 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:11,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 94 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:11:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-15 02:11:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 382. [2022-02-15 02:11:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:12,300 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:12,300 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:12,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 42 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:12,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:12,301 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 14, 4, 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 02:11:12,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-02-15 02:11:12,301 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2107014398, now seen corresponding path program 150 times [2022-02-15 02:11:12,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:12,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575060739] [2022-02-15 02:11:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:12,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:12,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:12,383 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:12,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:12,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:12,454 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:13,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:13,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575060739] [2022-02-15 02:11:13,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [575060739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:13,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:13,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:11:13,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372372494] [2022-02-15 02:11:13,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:13,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:11:13,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:11:13,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:11:13,808 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:15,610 INFO L93 Difference]: Finished difference Result 656 states and 765 transitions. [2022-02-15 02:11:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:11:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:15,611 INFO L225 Difference]: With dead ends: 656 [2022-02-15 02:11:15,611 INFO L226 Difference]: Without dead ends: 416 [2022-02-15 02:11:15,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:11:15,612 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:15,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 79 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:11:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-15 02:11:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 382. [2022-02-15 02:11:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:16,230 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:16,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:16,231 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 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 02:11:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-02-15 02:11:16,231 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1289365948, now seen corresponding path program 151 times [2022-02-15 02:11:16,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:16,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895260571] [2022-02-15 02:11:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:16,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:16,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:16,313 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:16,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:16,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:16,373 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:17,747 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:17,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895260571] [2022-02-15 02:11:17,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895260571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:17,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:17,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:11:17,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498469814] [2022-02-15 02:11:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:17,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:11:17,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:11:17,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:11:17,748 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:19,662 INFO L93 Difference]: Finished difference Result 653 states and 762 transitions. [2022-02-15 02:11:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:11:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:19,663 INFO L225 Difference]: With dead ends: 653 [2022-02-15 02:11:19,663 INFO L226 Difference]: Without dead ends: 413 [2022-02-15 02:11:19,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=231, Invalid=2219, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:11:19,664 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:19,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 99 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:11:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-15 02:11:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 382. [2022-02-15 02:11:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:20,286 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:20,286 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:20,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:20,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:20,287 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 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 02:11:20,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-02-15 02:11:20,287 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -298981954, now seen corresponding path program 152 times [2022-02-15 02:11:20,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:20,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853816900] [2022-02-15 02:11:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:20,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,359 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:20,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,431 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:20,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:21,875 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:21,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853816900] [2022-02-15 02:11:21,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [853816900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:21,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:21,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 02:11:21,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834295924] [2022-02-15 02:11:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:21,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 02:11:21,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 02:11:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:11:21,877 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:23,627 INFO L93 Difference]: Finished difference Result 651 states and 760 transitions. [2022-02-15 02:11:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:11:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:23,628 INFO L225 Difference]: With dead ends: 651 [2022-02-15 02:11:23,628 INFO L226 Difference]: Without dead ends: 411 [2022-02-15 02:11:23,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:11:23,629 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 3006 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:23,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:11:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-15 02:11:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 382. [2022-02-15 02:11:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 367 states have (on average 1.1689373297002725) internal successors, (429), 370 states have internal predecessors, (429), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 446 transitions. [2022-02-15 02:11:24,247 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 446 transitions. Word has length 76 [2022-02-15 02:11:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:24,247 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 446 transitions. [2022-02-15 02:11:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 446 transitions. [2022-02-15 02:11:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:11:24,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:24,248 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 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 02:11:24,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-02-15 02:11:24,248 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1310099204, now seen corresponding path program 153 times [2022-02-15 02:11:24,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:24,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631492552] [2022-02-15 02:11:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:24,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:24,289 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:24,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:24,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:24,368 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:24,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:25,780 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:25,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631492552] [2022-02-15 02:11:25,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [631492552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:25,780 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:25,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:11:25,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916629932] [2022-02-15 02:11:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:25,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:11:25,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:11:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:11:25,781 INFO L87 Difference]: Start difference. First operand 382 states and 446 transitions. Second operand has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 46 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:27,544 INFO L93 Difference]: Finished difference Result 662 states and 775 transitions. [2022-02-15 02:11:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 02:11:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 46 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:11:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:27,545 INFO L225 Difference]: With dead ends: 662 [2022-02-15 02:11:27,545 INFO L226 Difference]: Without dead ends: 411 [2022-02-15 02:11:27,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=2407, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:11:27,546 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3052 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:27,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 68 Invalid, 3064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3052 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:11:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-15 02:11:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 385. [2022-02-15 02:11:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 370 states have (on average 1.1702702702702703) internal successors, (433), 373 states have internal predecessors, (433), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 450 transitions. [2022-02-15 02:11:28,207 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 450 transitions. Word has length 76 [2022-02-15 02:11:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:28,207 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 450 transitions. [2022-02-15 02:11:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 46 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 450 transitions. [2022-02-15 02:11:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:28,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:28,208 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 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 02:11:28,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-02-15 02:11:28,208 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash 787799167, now seen corresponding path program 154 times [2022-02-15 02:11:28,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:28,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846060605] [2022-02-15 02:11:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:28,260 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:28,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:28,308 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:28,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:28,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:28,380 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:29,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:29,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846060605] [2022-02-15 02:11:29,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [846060605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:29,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:29,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:11:29,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736534592] [2022-02-15 02:11:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:29,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:11:29,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:11:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:11:29,641 INFO L87 Difference]: Start difference. First operand 385 states and 450 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:31,661 INFO L93 Difference]: Finished difference Result 698 states and 808 transitions. [2022-02-15 02:11:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:11:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:31,663 INFO L225 Difference]: With dead ends: 698 [2022-02-15 02:11:31,663 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 02:11:31,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 35 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:11:31,663 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:31,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 60 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:11:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 02:11:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 388. [2022-02-15 02:11:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:32,339 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:32,339 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:32,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:32,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:32,340 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 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 02:11:32,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-02-15 02:11:32,340 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1467071421, now seen corresponding path program 155 times [2022-02-15 02:11:32,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:32,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865977507] [2022-02-15 02:11:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:32,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:32,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:32,416 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:32,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:32,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:32,486 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:32,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:32,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:33,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:33,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865977507] [2022-02-15 02:11:33,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865977507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:33,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:33,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:11:33,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083604760] [2022-02-15 02:11:33,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:11:33,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:11:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:11:33,749 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:35,956 INFO L93 Difference]: Finished difference Result 701 states and 811 transitions. [2022-02-15 02:11:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:11:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:35,957 INFO L225 Difference]: With dead ends: 701 [2022-02-15 02:11:35,957 INFO L226 Difference]: Without dead ends: 461 [2022-02-15 02:11:35,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 34 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:11:35,958 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:35,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:11:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-02-15 02:11:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 388. [2022-02-15 02:11:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:36,692 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:36,692 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:36,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:36,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:36,692 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 3, 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 02:11:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-02-15 02:11:36,693 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2027771199, now seen corresponding path program 156 times [2022-02-15 02:11:36,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:36,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963717265] [2022-02-15 02:11:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:36,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:36,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:36,774 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:36,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:36,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:36,853 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:38,155 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:38,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963717265] [2022-02-15 02:11:38,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963717265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:38,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:38,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:11:38,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200096143] [2022-02-15 02:11:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:38,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:11:38,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:11:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:11:38,156 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:40,320 INFO L93 Difference]: Finished difference Result 698 states and 808 transitions. [2022-02-15 02:11:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:11:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:40,321 INFO L225 Difference]: With dead ends: 698 [2022-02-15 02:11:40,321 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 02:11:40,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:11:40,322 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:40,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 58 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:11:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 02:11:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 388. [2022-02-15 02:11:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:41,056 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 33 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:41,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:41,057 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 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 02:11:41,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-02-15 02:11:41,057 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2068445949, now seen corresponding path program 157 times [2022-02-15 02:11:41,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:41,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884710450] [2022-02-15 02:11:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:41,100 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:41,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:41,140 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:41,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:41,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:41,210 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:41,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:41,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:42,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:42,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884710450] [2022-02-15 02:11:42,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [884710450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:42,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:42,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:11:42,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000164361] [2022-02-15 02:11:42,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:42,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:11:42,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:11:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:11:42,490 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:44,697 INFO L93 Difference]: Finished difference Result 695 states and 805 transitions. [2022-02-15 02:11:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:11:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:44,697 INFO L225 Difference]: With dead ends: 695 [2022-02-15 02:11:44,698 INFO L226 Difference]: Without dead ends: 455 [2022-02-15 02:11:44,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:11:44,698 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 70 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:11:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-15 02:11:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 388. [2022-02-15 02:11:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:45,463 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:45,463 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:45,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:45,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:45,463 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 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 02:11:45,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-02-15 02:11:45,464 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1782620673, now seen corresponding path program 158 times [2022-02-15 02:11:45,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:45,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232488439] [2022-02-15 02:11:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:45,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:45,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:45,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:45,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:45,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:45,615 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:45,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:46,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:46,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232488439] [2022-02-15 02:11:46,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232488439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:46,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:46,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:11:46,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156691465] [2022-02-15 02:11:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:46,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:11:46,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:11:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:11:46,935 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:49,223 INFO L93 Difference]: Finished difference Result 692 states and 802 transitions. [2022-02-15 02:11:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:11:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:49,224 INFO L225 Difference]: With dead ends: 692 [2022-02-15 02:11:49,224 INFO L226 Difference]: Without dead ends: 452 [2022-02-15 02:11:49,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:11:49,225 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2900 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:49,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 98 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2900 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:11:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-15 02:11:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 388. [2022-02-15 02:11:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:49,938 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:49,938 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:49,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:49,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:49,939 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 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 02:11:49,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-02-15 02:11:49,939 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2031266365, now seen corresponding path program 159 times [2022-02-15 02:11:49,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:49,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602431874] [2022-02-15 02:11:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:49,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:50,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:50,000 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:50,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:50,070 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:50,070 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:50,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:51,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:51,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602431874] [2022-02-15 02:11:51,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [602431874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:51,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:51,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:11:51,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737746326] [2022-02-15 02:11:51,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:51,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:11:51,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:11:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:11:51,374 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:53,547 INFO L93 Difference]: Finished difference Result 689 states and 799 transitions. [2022-02-15 02:11:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:11:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:53,548 INFO L225 Difference]: With dead ends: 689 [2022-02-15 02:11:53,549 INFO L226 Difference]: Without dead ends: 449 [2022-02-15 02:11:53,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:11:53,549 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 82 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:11:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-15 02:11:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 388. [2022-02-15 02:11:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:54,273 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:54,273 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:54,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:54,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:54,274 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 12, 7, 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 02:11:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-02-15 02:11:54,274 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1678177983, now seen corresponding path program 160 times [2022-02-15 02:11:54,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:54,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330404999] [2022-02-15 02:11:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:54,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:54,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:54,369 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:54,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:54,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:54,450 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:54,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:54,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:55,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:55,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330404999] [2022-02-15 02:11:55,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330404999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:55,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:55,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:11:55,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267311665] [2022-02-15 02:11:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:55,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:11:55,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:11:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:11:55,761 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:58,004 INFO L93 Difference]: Finished difference Result 686 states and 796 transitions. [2022-02-15 02:11:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:11:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:11:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:58,005 INFO L225 Difference]: With dead ends: 686 [2022-02-15 02:11:58,005 INFO L226 Difference]: Without dead ends: 446 [2022-02-15 02:11:58,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:11:58,005 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:58,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 83 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:11:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-15 02:11:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 388. [2022-02-15 02:11:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:11:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:11:58,716 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:11:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:58,716 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:11:58,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:11:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:11:58,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:58,716 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 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 02:11:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-02-15 02:11:58,716 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash -371209859, now seen corresponding path program 161 times [2022-02-15 02:11:58,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:58,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801775365] [2022-02-15 02:11:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:58,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:58,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:58,789 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:58,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:58,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:58,860 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:58,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:58,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:11:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:00,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:00,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801775365] [2022-02-15 02:12:00,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [801775365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:00,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:00,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:12:00,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212046526] [2022-02-15 02:12:00,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:00,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:12:00,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:12:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:12:00,191 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:02,319 INFO L93 Difference]: Finished difference Result 683 states and 793 transitions. [2022-02-15 02:12:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:12:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:02,319 INFO L225 Difference]: With dead ends: 683 [2022-02-15 02:12:02,319 INFO L226 Difference]: Without dead ends: 443 [2022-02-15 02:12:02,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:12:02,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:02,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 75 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:12:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-15 02:12:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 388. [2022-02-15 02:12:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:03,039 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:03,039 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:03,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:03,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:03,040 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 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 02:12:03,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-02-15 02:12:03,040 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 52436863, now seen corresponding path program 162 times [2022-02-15 02:12:03,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:03,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607266679] [2022-02-15 02:12:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:03,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,111 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:03,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,180 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:04,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:04,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607266679] [2022-02-15 02:12:04,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [607266679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:04,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:04,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:12:04,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786167758] [2022-02-15 02:12:04,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:04,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:12:04,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:12:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:12:04,491 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:06,765 INFO L93 Difference]: Finished difference Result 680 states and 790 transitions. [2022-02-15 02:12:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:12:06,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:06,766 INFO L225 Difference]: With dead ends: 680 [2022-02-15 02:12:06,766 INFO L226 Difference]: Without dead ends: 440 [2022-02-15 02:12:06,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:12:06,767 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:06,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 86 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:12:06,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-15 02:12:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 388. [2022-02-15 02:12:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:07,495 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:07,495 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:07,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:07,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:07,495 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 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 02:12:07,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-02-15 02:12:07,496 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -976922435, now seen corresponding path program 163 times [2022-02-15 02:12:07,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:07,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317429858] [2022-02-15 02:12:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:07,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,577 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,577 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:07,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,646 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:07,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:08,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:08,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317429858] [2022-02-15 02:12:08,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [317429858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:08,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:08,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:12:08,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806581261] [2022-02-15 02:12:08,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:08,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:12:08,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:12:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:12:08,994 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:11,027 INFO L93 Difference]: Finished difference Result 677 states and 787 transitions. [2022-02-15 02:12:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:12:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:11,027 INFO L225 Difference]: With dead ends: 677 [2022-02-15 02:12:11,027 INFO L226 Difference]: Without dead ends: 437 [2022-02-15 02:12:11,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:12:11,028 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:11,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:12:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-15 02:12:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 388. [2022-02-15 02:12:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:11,769 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:11,769 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:11,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:11,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:11,770 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 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 02:12:11,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-02-15 02:12:11,770 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1820927937, now seen corresponding path program 164 times [2022-02-15 02:12:11,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:11,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569112821] [2022-02-15 02:12:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:11,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,857 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:11,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,946 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:12,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:13,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:13,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569112821] [2022-02-15 02:12:13,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569112821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:13,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:13,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:12:13,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562866227] [2022-02-15 02:12:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:13,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:12:13,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:12:13,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:12:13,311 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:15,306 INFO L93 Difference]: Finished difference Result 674 states and 784 transitions. [2022-02-15 02:12:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:12:15,307 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:15,307 INFO L225 Difference]: With dead ends: 674 [2022-02-15 02:12:15,307 INFO L226 Difference]: Without dead ends: 434 [2022-02-15 02:12:15,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:12:15,308 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:15,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 78 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:12:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-15 02:12:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 388. [2022-02-15 02:12:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:16,031 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:16,031 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:16,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 41 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:16,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:16,032 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 12, 7, 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 02:12:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-02-15 02:12:16,032 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1546168323, now seen corresponding path program 165 times [2022-02-15 02:12:16,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:16,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923365958] [2022-02-15 02:12:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:16,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:16,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:16,113 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:16,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:16,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:16,183 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:16,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:16,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:17,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:17,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923365958] [2022-02-15 02:12:17,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [923365958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:17,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:17,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:12:17,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844778738] [2022-02-15 02:12:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:17,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:12:17,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:12:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:12:17,557 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:19,670 INFO L93 Difference]: Finished difference Result 671 states and 781 transitions. [2022-02-15 02:12:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:12:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:19,670 INFO L225 Difference]: With dead ends: 671 [2022-02-15 02:12:19,670 INFO L226 Difference]: Without dead ends: 431 [2022-02-15 02:12:19,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:12:19,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:19,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 89 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:12:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-15 02:12:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 388. [2022-02-15 02:12:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:20,396 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:20,396 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:20,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 42 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:20,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:20,397 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 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 02:12:20,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-02-15 02:12:20,397 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash -159964929, now seen corresponding path program 166 times [2022-02-15 02:12:20,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:20,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629916410] [2022-02-15 02:12:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:20,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:20,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:20,467 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:20,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:20,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:20,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:20,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:22,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:22,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629916410] [2022-02-15 02:12:22,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629916410] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:22,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:22,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:12:22,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743664617] [2022-02-15 02:12:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:22,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:12:22,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:12:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:12:22,006 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:24,141 INFO L93 Difference]: Finished difference Result 668 states and 778 transitions. [2022-02-15 02:12:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:12:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:24,142 INFO L225 Difference]: With dead ends: 668 [2022-02-15 02:12:24,142 INFO L226 Difference]: Without dead ends: 428 [2022-02-15 02:12:24,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:12:24,143 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 3525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:24,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 86 Invalid, 3525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3514 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:12:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-15 02:12:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 388. [2022-02-15 02:12:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:24,863 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:24,863 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:24,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:24,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:24,864 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 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 02:12:24,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-02-15 02:12:24,864 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash -97925315, now seen corresponding path program 167 times [2022-02-15 02:12:24,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:24,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166365589] [2022-02-15 02:12:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:24,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:24,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:24,936 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:24,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:25,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:25,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:26,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:26,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166365589] [2022-02-15 02:12:26,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [166365589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:26,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:26,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:12:26,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918052104] [2022-02-15 02:12:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:26,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:12:26,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:12:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:12:26,439 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:28,630 INFO L93 Difference]: Finished difference Result 665 states and 775 transitions. [2022-02-15 02:12:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:12:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:28,631 INFO L225 Difference]: With dead ends: 665 [2022-02-15 02:12:28,631 INFO L226 Difference]: Without dead ends: 425 [2022-02-15 02:12:28,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=2222, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:12:28,631 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:28,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 112 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:12:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-15 02:12:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 388. [2022-02-15 02:12:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:29,360 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:29,360 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:29,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 44 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:29,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:29,361 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 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 02:12:29,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-02-15 02:12:29,361 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1903363649, now seen corresponding path program 168 times [2022-02-15 02:12:29,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:29,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904482452] [2022-02-15 02:12:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:29,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:29,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:29,431 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:29,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:29,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:29,503 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:30,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:30,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904482452] [2022-02-15 02:12:30,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [904482452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:30,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:30,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 02:12:30,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885992788] [2022-02-15 02:12:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 02:12:30,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 02:12:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:12:30,940 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:32,898 INFO L93 Difference]: Finished difference Result 662 states and 772 transitions. [2022-02-15 02:12:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:12:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:32,899 INFO L225 Difference]: With dead ends: 662 [2022-02-15 02:12:32,899 INFO L226 Difference]: Without dead ends: 422 [2022-02-15 02:12:32,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:12:32,900 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:32,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:12:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-15 02:12:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 388. [2022-02-15 02:12:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:33,629 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:33,629 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:33,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:33,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:33,629 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 3, 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 02:12:33,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-02-15 02:12:33,629 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1573955197, now seen corresponding path program 169 times [2022-02-15 02:12:33,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:33,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254038844] [2022-02-15 02:12:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:33,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:33,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:33,712 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:33,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:33,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:33,782 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:35,253 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:35,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254038844] [2022-02-15 02:12:35,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254038844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:35,253 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:35,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:12:35,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057488974] [2022-02-15 02:12:35,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:35,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:12:35,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:35,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:12:35,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:12:35,254 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:37,184 INFO L93 Difference]: Finished difference Result 659 states and 769 transitions. [2022-02-15 02:12:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 02:12:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:37,185 INFO L225 Difference]: With dead ends: 659 [2022-02-15 02:12:37,185 INFO L226 Difference]: Without dead ends: 419 [2022-02-15 02:12:37,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:12:37,186 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:37,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 76 Invalid, 3120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:12:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-15 02:12:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 388. [2022-02-15 02:12:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:37,920 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:37,920 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:37,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 46 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:37,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:37,921 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 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 02:12:37,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-02-15 02:12:37,921 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -14392705, now seen corresponding path program 170 times [2022-02-15 02:12:37,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:37,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688365295] [2022-02-15 02:12:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:37,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:37,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:37,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:38,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:38,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:38,052 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:38,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:38,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:39,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:39,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688365295] [2022-02-15 02:12:39,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [688365295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:39,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:39,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 02:12:39,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111959876] [2022-02-15 02:12:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:39,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 02:12:39,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 02:12:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2311, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:12:39,527 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 47 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:41,537 INFO L93 Difference]: Finished difference Result 657 states and 767 transitions. [2022-02-15 02:12:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:12:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 47 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:41,538 INFO L225 Difference]: With dead ends: 657 [2022-02-15 02:12:41,538 INFO L226 Difference]: Without dead ends: 417 [2022-02-15 02:12:41,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:12:41,539 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:41,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 91 Invalid, 3481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:12:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-15 02:12:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 388. [2022-02-15 02:12:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 373 states have (on average 1.1689008042895441) internal successors, (436), 376 states have internal predecessors, (436), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 453 transitions. [2022-02-15 02:12:42,280 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 453 transitions. Word has length 79 [2022-02-15 02:12:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:42,280 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 453 transitions. [2022-02-15 02:12:42,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 47 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 453 transitions. [2022-02-15 02:12:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:12:42,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:42,281 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 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 02:12:42,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-02-15 02:12:42,281 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1025509955, now seen corresponding path program 171 times [2022-02-15 02:12:42,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:42,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500134536] [2022-02-15 02:12:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:42,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:42,320 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:42,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:42,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:42,388 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:43,879 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:43,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500134536] [2022-02-15 02:12:43,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500134536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:43,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:43,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 02:12:43,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987040070] [2022-02-15 02:12:43,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:43,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 02:12:43,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 02:12:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:12:43,880 INFO L87 Difference]: Start difference. First operand 388 states and 453 transitions. Second operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 48 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:45,948 INFO L93 Difference]: Finished difference Result 668 states and 782 transitions. [2022-02-15 02:12:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 02:12:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 48 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:12:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:45,949 INFO L225 Difference]: With dead ends: 668 [2022-02-15 02:12:45,949 INFO L226 Difference]: Without dead ends: 417 [2022-02-15 02:12:45,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=256, Invalid=2606, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:12:45,950 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:45,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 91 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:12:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-15 02:12:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 391. [2022-02-15 02:12:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 376 states have (on average 1.1702127659574468) internal successors, (440), 379 states have internal predecessors, (440), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 457 transitions. [2022-02-15 02:12:46,694 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 457 transitions. Word has length 79 [2022-02-15 02:12:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:46,694 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 457 transitions. [2022-02-15 02:12:46,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 48 states have internal predecessors, (73), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 457 transitions. [2022-02-15 02:12:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 02:12:46,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:46,694 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 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] [2022-02-15 02:12:46,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-02-15 02:12:46,695 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash -860791901, now seen corresponding path program 8 times [2022-02-15 02:12:46,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:46,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108711389] [2022-02-15 02:12:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:46,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:46,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:46,769 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:46,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:46,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:47,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:47,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108711389] [2022-02-15 02:12:47,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108711389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:47,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:47,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:12:47,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470016281] [2022-02-15 02:12:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:47,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:12:47,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:12:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:12:47,047 INFO L87 Difference]: Start difference. First operand 391 states and 457 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:48,256 INFO L93 Difference]: Finished difference Result 707 states and 831 transitions. [2022-02-15 02:12:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:12:48,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 81 [2022-02-15 02:12:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:48,257 INFO L225 Difference]: With dead ends: 707 [2022-02-15 02:12:48,257 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 02:12:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=696, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:12:48,257 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:48,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 37 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:12:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 02:12:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 418. [2022-02-15 02:12:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 403 states have (on average 1.1662531017369726) internal successors, (470), 406 states have internal predecessors, (470), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 487 transitions. [2022-02-15 02:12:49,018 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 487 transitions. Word has length 81 [2022-02-15 02:12:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:49,018 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 487 transitions. [2022-02-15 02:12:49,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 487 transitions. [2022-02-15 02:12:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:12:49,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:49,019 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 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 02:12:49,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-02-15 02:12:49,019 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:49,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1888113636, now seen corresponding path program 172 times [2022-02-15 02:12:49,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:49,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556807489] [2022-02-15 02:12:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:49,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:49,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:49,095 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:49,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:49,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:49,177 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:49,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:50,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:50,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556807489] [2022-02-15 02:12:50,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1556807489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:50,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:50,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:12:50,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169870644] [2022-02-15 02:12:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:50,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:12:50,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:12:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:12:50,517 INFO L87 Difference]: Start difference. First operand 418 states and 487 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:53,165 INFO L93 Difference]: Finished difference Result 767 states and 886 transitions. [2022-02-15 02:12:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:12:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:12:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:53,166 INFO L225 Difference]: With dead ends: 767 [2022-02-15 02:12:53,166 INFO L226 Difference]: Without dead ends: 500 [2022-02-15 02:12:53,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 6 SyntacticMatches, 38 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:12:53,167 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 78 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:12:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-02-15 02:12:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 474. [2022-02-15 02:12:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 459 states have (on average 1.1481481481481481) internal successors, (527), 462 states have internal predecessors, (527), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:12:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 544 transitions. [2022-02-15 02:12:54,632 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 544 transitions. Word has length 82 [2022-02-15 02:12:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:54,632 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 544 transitions. [2022-02-15 02:12:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 544 transitions. [2022-02-15 02:12:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:12:54,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:54,632 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 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 02:12:54,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-02-15 02:12:54,633 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 720673822, now seen corresponding path program 173 times [2022-02-15 02:12:54,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:54,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723084766] [2022-02-15 02:12:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:54,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:54,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:54,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:54,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:54,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:54,771 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:54,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:54,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:12:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:56,104 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:56,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723084766] [2022-02-15 02:12:56,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723084766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:56,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:56,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:12:56,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506675795] [2022-02-15 02:12:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:56,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:12:56,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:56,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:12:56,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:12:56,105 INFO L87 Difference]: Start difference. First operand 474 states and 544 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:59,250 INFO L93 Difference]: Finished difference Result 818 states and 936 transitions. [2022-02-15 02:12:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:12:59,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:12:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:59,250 INFO L225 Difference]: With dead ends: 818 [2022-02-15 02:12:59,250 INFO L226 Difference]: Without dead ends: 551 [2022-02-15 02:12:59,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 37 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:12:59,251 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:59,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 75 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:12:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-15 02:13:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 477. [2022-02-15 02:13:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:00,766 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:00,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:00,766 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:00,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 33 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:00,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:00,767 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 17, 3, 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 02:13:00,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-02-15 02:13:00,767 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1399946076, now seen corresponding path program 174 times [2022-02-15 02:13:00,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:00,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98583933] [2022-02-15 02:13:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:00,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,838 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:00,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,919 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:02,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:02,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98583933] [2022-02-15 02:13:02,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [98583933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:02,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:02,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:13:02,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606270667] [2022-02-15 02:13:02,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:02,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:13:02,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:02,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:13:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:13:02,276 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:05,392 INFO L93 Difference]: Finished difference Result 821 states and 939 transitions. [2022-02-15 02:13:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:13:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:05,393 INFO L225 Difference]: With dead ends: 821 [2022-02-15 02:13:05,393 INFO L226 Difference]: Without dead ends: 554 [2022-02-15 02:13:05,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 36 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:13:05,393 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:05,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 56 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:13:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-02-15 02:13:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 477. [2022-02-15 02:13:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:06,965 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:06,965 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:06,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:06,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:06,966 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 16, 4, 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 02:13:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-02-15 02:13:06,966 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1960645854, now seen corresponding path program 175 times [2022-02-15 02:13:06,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:06,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489873428] [2022-02-15 02:13:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:06,999 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:07,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:07,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:07,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:07,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:07,114 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:07,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:07,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:08,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:08,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489873428] [2022-02-15 02:13:08,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [489873428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:08,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:08,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:13:08,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525925604] [2022-02-15 02:13:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:08,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:13:08,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:13:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:13:08,490 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:11,738 INFO L93 Difference]: Finished difference Result 818 states and 936 transitions. [2022-02-15 02:13:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:13:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:11,739 INFO L225 Difference]: With dead ends: 818 [2022-02-15 02:13:11,739 INFO L226 Difference]: Without dead ends: 551 [2022-02-15 02:13:11,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 35 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:13:11,739 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:11,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 72 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:13:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-15 02:13:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 477. [2022-02-15 02:13:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:13,297 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:13,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 35 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:13,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:13,298 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 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 02:13:13,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-02-15 02:13:13,298 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2001320604, now seen corresponding path program 176 times [2022-02-15 02:13:13,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:13,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63924774] [2022-02-15 02:13:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:13,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:13,384 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:13,384 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:13,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:13,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:13,443 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:14,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:14,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63924774] [2022-02-15 02:13:14,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [63924774] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:14,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:14,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:13:14,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076710613] [2022-02-15 02:13:14,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:14,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:13:14,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:13:14,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:13:14,796 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:18,150 INFO L93 Difference]: Finished difference Result 815 states and 933 transitions. [2022-02-15 02:13:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:13:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:18,151 INFO L225 Difference]: With dead ends: 815 [2022-02-15 02:13:18,151 INFO L226 Difference]: Without dead ends: 548 [2022-02-15 02:13:18,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 34 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:13:18,151 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:18,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 98 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:13:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-15 02:13:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 477. [2022-02-15 02:13:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:19,715 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:19,715 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:19,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 36 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:19,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:19,716 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 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 02:13:19,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-02-15 02:13:19,716 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1849746018, now seen corresponding path program 177 times [2022-02-15 02:13:19,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:19,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554959681] [2022-02-15 02:13:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:19,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:19,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:19,786 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:19,816 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:19,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:19,852 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:19,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:21,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:21,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554959681] [2022-02-15 02:13:21,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554959681] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:21,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:21,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:13:21,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749629126] [2022-02-15 02:13:21,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:21,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:13:21,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:21,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:13:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:13:21,224 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:24,564 INFO L93 Difference]: Finished difference Result 812 states and 930 transitions. [2022-02-15 02:13:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:13:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:24,564 INFO L225 Difference]: With dead ends: 812 [2022-02-15 02:13:24,564 INFO L226 Difference]: Without dead ends: 545 [2022-02-15 02:13:24,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:13:24,565 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2942 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:24,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 93 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2942 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:13:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-02-15 02:13:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 477. [2022-02-15 02:13:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:26,172 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:26,173 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:26,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:26,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:26,173 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 13, 7, 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 02:13:26,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-02-15 02:13:26,173 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1964141020, now seen corresponding path program 178 times [2022-02-15 02:13:26,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:26,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411930528] [2022-02-15 02:13:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:26,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:26,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:26,246 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:26,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:26,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:26,314 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:26,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:26,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:27,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:27,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411930528] [2022-02-15 02:13:27,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1411930528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:27,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:27,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:13:27,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793400273] [2022-02-15 02:13:27,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:27,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:13:27,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:13:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:13:27,689 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:30,989 INFO L93 Difference]: Finished difference Result 809 states and 927 transitions. [2022-02-15 02:13:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:13:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:30,990 INFO L225 Difference]: With dead ends: 809 [2022-02-15 02:13:30,990 INFO L226 Difference]: Without dead ends: 542 [2022-02-15 02:13:30,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 32 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:13:30,990 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:30,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 87 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:13:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-15 02:13:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 477. [2022-02-15 02:13:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:32,594 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:32,594 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:32,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:32,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:32,594 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 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 02:13:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-02-15 02:13:32,595 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:32,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1611052638, now seen corresponding path program 179 times [2022-02-15 02:13:32,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:32,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672774950] [2022-02-15 02:13:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:32,638 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:32,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:32,677 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:32,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:32,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:32,751 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:32,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:34,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:34,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672774950] [2022-02-15 02:13:34,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [672774950] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:34,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:34,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:13:34,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606133690] [2022-02-15 02:13:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:34,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:13:34,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:13:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:13:34,123 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:37,430 INFO L93 Difference]: Finished difference Result 806 states and 924 transitions. [2022-02-15 02:13:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:13:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:37,430 INFO L225 Difference]: With dead ends: 806 [2022-02-15 02:13:37,430 INFO L226 Difference]: Without dead ends: 539 [2022-02-15 02:13:37,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:13:37,431 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:37,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 66 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:13:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-15 02:13:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 477. [2022-02-15 02:13:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:38,994 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:38,995 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:38,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 39 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:38,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:38,995 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 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 02:13:38,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-02-15 02:13:38,995 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash -438335204, now seen corresponding path program 180 times [2022-02-15 02:13:38,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:38,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752547047] [2022-02-15 02:13:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:39,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:39,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:39,060 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:39,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:39,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:39,141 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:39,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:39,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:40,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:40,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752547047] [2022-02-15 02:13:40,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752547047] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:40,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:40,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:13:40,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337836651] [2022-02-15 02:13:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:40,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:13:40,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:13:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:13:40,561 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:43,693 INFO L93 Difference]: Finished difference Result 803 states and 921 transitions. [2022-02-15 02:13:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:13:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:43,694 INFO L225 Difference]: With dead ends: 803 [2022-02-15 02:13:43,694 INFO L226 Difference]: Without dead ends: 536 [2022-02-15 02:13:43,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:13:43,694 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:43,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:13:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-15 02:13:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 477. [2022-02-15 02:13:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:45,280 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:45,280 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:45,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:45,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:45,281 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 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 02:13:45,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-02-15 02:13:45,281 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -14688482, now seen corresponding path program 181 times [2022-02-15 02:13:45,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:45,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625161868] [2022-02-15 02:13:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:45,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:45,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:45,352 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:45,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:45,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:45,422 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:45,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:45,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:46,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:46,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625161868] [2022-02-15 02:13:46,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625161868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:46,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:46,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:13:46,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053164073] [2022-02-15 02:13:46,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:13:46,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:13:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:13:46,840 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:49,859 INFO L93 Difference]: Finished difference Result 800 states and 918 transitions. [2022-02-15 02:13:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:13:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:49,860 INFO L225 Difference]: With dead ends: 800 [2022-02-15 02:13:49,860 INFO L226 Difference]: Without dead ends: 533 [2022-02-15 02:13:49,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:13:49,861 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:49,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:13:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-15 02:13:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 477. [2022-02-15 02:13:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:51,478 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:51,478 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:51,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:51,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:51,479 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 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 02:13:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-02-15 02:13:51,479 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1044047780, now seen corresponding path program 182 times [2022-02-15 02:13:51,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:51,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273504235] [2022-02-15 02:13:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:51,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:51,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:51,563 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:51,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:51,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:51,624 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:51,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:53,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:53,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273504235] [2022-02-15 02:13:53,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [273504235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:53,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:53,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:13:53,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968267535] [2022-02-15 02:13:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:53,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:13:53,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:13:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:13:53,047 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:56,352 INFO L93 Difference]: Finished difference Result 797 states and 915 transitions. [2022-02-15 02:13:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:13:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:13:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:56,353 INFO L225 Difference]: With dead ends: 797 [2022-02-15 02:13:56,353 INFO L226 Difference]: Without dead ends: 530 [2022-02-15 02:13:56,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:13:56,353 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 104 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:13:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-02-15 02:13:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 477. [2022-02-15 02:13:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:13:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:13:57,920 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:13:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:57,920 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:13:57,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:13:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:13:57,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:57,921 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 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 02:13:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-02-15 02:13:57,921 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1888053282, now seen corresponding path program 183 times [2022-02-15 02:13:57,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:57,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965259482] [2022-02-15 02:13:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:57,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:58,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:58,003 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:58,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:58,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:58,074 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:58,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:58,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:13:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:59,543 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:59,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965259482] [2022-02-15 02:13:59,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [965259482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:59,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:59,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:13:59,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237802034] [2022-02-15 02:13:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:13:59,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:13:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:13:59,544 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:02,780 INFO L93 Difference]: Finished difference Result 794 states and 912 transitions. [2022-02-15 02:14:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:14:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:02,780 INFO L225 Difference]: With dead ends: 794 [2022-02-15 02:14:02,781 INFO L226 Difference]: Without dead ends: 527 [2022-02-15 02:14:02,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=218, Invalid=2134, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:14:02,782 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:02,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 79 Invalid, 3476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:14:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-02-15 02:14:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 477. [2022-02-15 02:14:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:04,392 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:04,392 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:04,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:04,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:04,393 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 13, 7, 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 02:14:04,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-02-15 02:14:04,393 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1613293668, now seen corresponding path program 184 times [2022-02-15 02:14:04,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:04,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840134217] [2022-02-15 02:14:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:04,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:04,477 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:04,477 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:04,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:04,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:04,546 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:06,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:06,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840134217] [2022-02-15 02:14:06,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [840134217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:06,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:06,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:14:06,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139725246] [2022-02-15 02:14:06,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:06,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:14:06,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:14:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:14:06,029 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:09,243 INFO L93 Difference]: Finished difference Result 791 states and 909 transitions. [2022-02-15 02:14:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:14:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:09,244 INFO L225 Difference]: With dead ends: 791 [2022-02-15 02:14:09,244 INFO L226 Difference]: Without dead ends: 524 [2022-02-15 02:14:09,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:14:09,245 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:09,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 86 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3572 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:14:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-15 02:14:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 477. [2022-02-15 02:14:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:10,862 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:10,862 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:10,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 44 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:10,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:10,863 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 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 02:14:10,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-02-15 02:14:10,863 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash -227090274, now seen corresponding path program 185 times [2022-02-15 02:14:10,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:10,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161434609] [2022-02-15 02:14:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:10,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:10,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:10,935 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:10,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:11,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:11,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:11,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:11,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:12,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:12,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161434609] [2022-02-15 02:14:12,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161434609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:12,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:12,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 02:14:12,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425673756] [2022-02-15 02:14:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:12,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 02:14:12,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 02:14:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:14:12,509 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:15,693 INFO L93 Difference]: Finished difference Result 788 states and 906 transitions. [2022-02-15 02:14:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:14:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:15,694 INFO L225 Difference]: With dead ends: 788 [2022-02-15 02:14:15,694 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 02:14:15,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:14:15,694 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:15,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 96 Invalid, 3573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3563 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:14:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 02:14:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 477. [2022-02-15 02:14:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:17,307 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:17,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:17,308 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 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 02:14:17,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-02-15 02:14:17,308 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash -165050660, now seen corresponding path program 186 times [2022-02-15 02:14:17,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:17,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080724970] [2022-02-15 02:14:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:17,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:17,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:17,377 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:17,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:17,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:17,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:17,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:18,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:18,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080724970] [2022-02-15 02:14:18,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080724970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:18,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:18,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:14:18,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082695315] [2022-02-15 02:14:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:14:18,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:14:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2221, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:14:18,966 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:22,130 INFO L93 Difference]: Finished difference Result 785 states and 903 transitions. [2022-02-15 02:14:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 02:14:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:22,130 INFO L225 Difference]: With dead ends: 785 [2022-02-15 02:14:22,130 INFO L226 Difference]: Without dead ends: 518 [2022-02-15 02:14:22,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:14:22,131 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 3716 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:22,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3716 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:14:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-02-15 02:14:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 477. [2022-02-15 02:14:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:23,707 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:23,708 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:23,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 46 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:23,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:23,708 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 16, 4, 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 02:14:23,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-02-15 02:14:23,708 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1970488994, now seen corresponding path program 187 times [2022-02-15 02:14:23,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:23,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723244914] [2022-02-15 02:14:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:23,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:23,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:23,790 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:23,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:23,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:23,874 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:23,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:23,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:25,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:25,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723244914] [2022-02-15 02:14:25,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723244914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:25,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:25,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 02:14:25,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022872140] [2022-02-15 02:14:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:25,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 02:14:25,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 02:14:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:14:25,398 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:28,549 INFO L93 Difference]: Finished difference Result 782 states and 900 transitions. [2022-02-15 02:14:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:14:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:28,554 INFO L225 Difference]: With dead ends: 782 [2022-02-15 02:14:28,554 INFO L226 Difference]: Without dead ends: 515 [2022-02-15 02:14:28,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:14:28,555 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3825 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:28,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 107 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3825 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:14:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-02-15 02:14:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 477. [2022-02-15 02:14:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:30,176 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:30,177 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:30,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:30,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:30,177 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 17, 3, 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 02:14:30,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-02-15 02:14:30,177 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1506829852, now seen corresponding path program 188 times [2022-02-15 02:14:30,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:30,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952994257] [2022-02-15 02:14:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:30,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:30,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:30,269 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:30,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:30,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:30,337 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:30,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:30,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:31,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:31,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952994257] [2022-02-15 02:14:31,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [952994257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:31,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:31,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 02:14:31,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910778634] [2022-02-15 02:14:31,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 02:14:31,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 02:14:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2409, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:14:31,865 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 48 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:34,900 INFO L93 Difference]: Finished difference Result 779 states and 897 transitions. [2022-02-15 02:14:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 02:14:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 48 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:34,901 INFO L225 Difference]: With dead ends: 779 [2022-02-15 02:14:34,901 INFO L226 Difference]: Without dead ends: 512 [2022-02-15 02:14:34,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:14:34,901 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:34,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 88 Invalid, 3679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3669 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:14:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-15 02:14:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 477. [2022-02-15 02:14:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:36,515 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:36,515 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:36,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 48 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:36,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:36,515 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 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 02:14:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-02-15 02:14:36,516 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash -81518050, now seen corresponding path program 189 times [2022-02-15 02:14:36,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:36,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654987458] [2022-02-15 02:14:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:36,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:36,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:36,608 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:36,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:36,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:36,676 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:36,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:38,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:38,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654987458] [2022-02-15 02:14:38,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [654987458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:38,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:38,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 02:14:38,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563436819] [2022-02-15 02:14:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 02:14:38,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 02:14:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:14:38,227 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 49 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:41,254 INFO L93 Difference]: Finished difference Result 777 states and 895 transitions. [2022-02-15 02:14:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 02:14:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 49 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:41,255 INFO L225 Difference]: With dead ends: 777 [2022-02-15 02:14:41,255 INFO L226 Difference]: Without dead ends: 510 [2022-02-15 02:14:41,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:14:41,256 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:41,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 84 Invalid, 3672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:14:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-15 02:14:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 477. [2022-02-15 02:14:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 462 states have (on average 1.147186147186147) internal successors, (530), 465 states have internal predecessors, (530), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 547 transitions. [2022-02-15 02:14:42,850 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 547 transitions. Word has length 82 [2022-02-15 02:14:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:42,850 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 547 transitions. [2022-02-15 02:14:42,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 49 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 547 transitions. [2022-02-15 02:14:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:14:42,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:42,851 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 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 02:14:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-02-15 02:14:42,851 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1092635300, now seen corresponding path program 190 times [2022-02-15 02:14:42,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:42,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209805389] [2022-02-15 02:14:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:42,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:42,890 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:14:42,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:42,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:42,958 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:42,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:44,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:44,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209805389] [2022-02-15 02:14:44,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [209805389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:44,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:44,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 02:14:44,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744334227] [2022-02-15 02:14:44,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:44,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 02:14:44,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 02:14:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:14:44,550 INFO L87 Difference]: Start difference. First operand 477 states and 547 transitions. Second operand has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:47,642 INFO L93 Difference]: Finished difference Result 788 states and 910 transitions. [2022-02-15 02:14:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 02:14:47,643 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:14:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:47,643 INFO L225 Difference]: With dead ends: 788 [2022-02-15 02:14:47,643 INFO L226 Difference]: Without dead ends: 510 [2022-02-15 02:14:47,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 02:14:47,644 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4035 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 4047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:47,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 92 Invalid, 4047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4035 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:14:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-15 02:14:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 480. [2022-02-15 02:14:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 465 states have (on average 1.1483870967741936) internal successors, (534), 468 states have internal predecessors, (534), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 551 transitions. [2022-02-15 02:14:49,249 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 551 transitions. Word has length 82 [2022-02-15 02:14:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 551 transitions. [2022-02-15 02:14:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 551 transitions. [2022-02-15 02:14:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:14:49,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:49,250 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 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 02:14:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-02-15 02:14:49,250 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1927793379, now seen corresponding path program 1 times [2022-02-15 02:14:49,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:49,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409817962] [2022-02-15 02:14:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:49,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:49,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:49,321 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:49,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:49,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:49,392 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:49,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:50,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:50,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409817962] [2022-02-15 02:14:50,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409817962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:50,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:50,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:14:50,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638581486] [2022-02-15 02:14:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:50,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:14:50,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:14:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:14:50,782 INFO L87 Difference]: Start difference. First operand 480 states and 551 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:53,691 INFO L93 Difference]: Finished difference Result 518 states and 591 transitions. [2022-02-15 02:14:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:14:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:14:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:53,691 INFO L225 Difference]: With dead ends: 518 [2022-02-15 02:14:53,692 INFO L226 Difference]: Without dead ends: 516 [2022-02-15 02:14:53,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 6 SyntacticMatches, 39 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:14:53,692 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:53,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:14:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-02-15 02:14:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 480. [2022-02-15 02:14:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 465 states have (on average 1.1483870967741936) internal successors, (534), 468 states have internal predecessors, (534), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:14:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 551 transitions. [2022-02-15 02:14:55,314 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 551 transitions. Word has length 85 [2022-02-15 02:14:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:55,314 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 551 transitions. [2022-02-15 02:14:55,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 551 transitions. [2022-02-15 02:14:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:14:55,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:55,314 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 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 02:14:55,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-02-15 02:14:55,315 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -164506595, now seen corresponding path program 191 times [2022-02-15 02:14:55,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:55,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723651791] [2022-02-15 02:14:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:55,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:55,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:55,415 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:55,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:55,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:55,477 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:55,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:55,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:14:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:56,926 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:56,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723651791] [2022-02-15 02:14:56,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723651791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:56,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:56,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:14:56,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867268522] [2022-02-15 02:14:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:56,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:14:56,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:14:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:14:56,927 INFO L87 Difference]: Start difference. First operand 480 states and 551 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:00,538 INFO L93 Difference]: Finished difference Result 829 states and 950 transitions. [2022-02-15 02:15:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:15:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:00,539 INFO L225 Difference]: With dead ends: 829 [2022-02-15 02:15:00,539 INFO L226 Difference]: Without dead ends: 562 [2022-02-15 02:15:00,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 38 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:15:00,539 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:00,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 70 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:15:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-15 02:15:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 536. [2022-02-15 02:15:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 521 states have (on average 1.1343570057581573) internal successors, (591), 524 states have internal predecessors, (591), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 608 transitions. [2022-02-15 02:15:03,054 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 608 transitions. Word has length 85 [2022-02-15 02:15:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:03,054 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 608 transitions. [2022-02-15 02:15:03,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 608 transitions. [2022-02-15 02:15:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:03,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:03,055 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 3, 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 02:15:03,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-02-15 02:15:03,055 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1850686433, now seen corresponding path program 192 times [2022-02-15 02:15:03,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:03,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769359412] [2022-02-15 02:15:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:03,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:03,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:03,143 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:03,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:03,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:03,213 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:03,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:04,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:04,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769359412] [2022-02-15 02:15:04,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [769359412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:04,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:04,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:15:04,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196287494] [2022-02-15 02:15:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:04,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:15:04,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:15:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:15:04,645 INFO L87 Difference]: Start difference. First operand 536 states and 608 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:09,103 INFO L93 Difference]: Finished difference Result 880 states and 1000 transitions. [2022-02-15 02:15:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:15:09,103 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:09,104 INFO L225 Difference]: With dead ends: 880 [2022-02-15 02:15:09,104 INFO L226 Difference]: Without dead ends: 613 [2022-02-15 02:15:09,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 37 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:15:09,104 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:09,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 80 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:15:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-15 02:15:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 539. [2022-02-15 02:15:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:11,653 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:11,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:11,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:11,653 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 4, 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 02:15:11,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-02-15 02:15:11,653 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:11,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1171414179, now seen corresponding path program 193 times [2022-02-15 02:15:11,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:11,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674082698] [2022-02-15 02:15:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:11,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:11,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:11,729 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:11,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:11,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:11,798 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:11,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:11,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:13,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:13,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674082698] [2022-02-15 02:15:13,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [674082698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:13,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:13,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:15:13,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239658060] [2022-02-15 02:15:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:15:13,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:15:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:15:13,271 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:17,751 INFO L93 Difference]: Finished difference Result 883 states and 1003 transitions. [2022-02-15 02:15:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:15:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:17,752 INFO L225 Difference]: With dead ends: 883 [2022-02-15 02:15:17,752 INFO L226 Difference]: Without dead ends: 616 [2022-02-15 02:15:17,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 36 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:15:17,753 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:17,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:15:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-15 02:15:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 539. [2022-02-15 02:15:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:20,247 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:20,247 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:20,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:20,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:20,248 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 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 02:15:20,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-02-15 02:15:20,248 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash -610714401, now seen corresponding path program 194 times [2022-02-15 02:15:20,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:20,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519333171] [2022-02-15 02:15:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:20,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:20,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:20,309 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:20,340 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:20,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:20,369 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:20,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:20,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:21,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:21,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519333171] [2022-02-15 02:15:21,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519333171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:21,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:21,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:15:21,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66100083] [2022-02-15 02:15:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:21,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:15:21,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:15:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:15:21,857 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:26,320 INFO L93 Difference]: Finished difference Result 880 states and 1000 transitions. [2022-02-15 02:15:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:15:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:26,321 INFO L225 Difference]: With dead ends: 880 [2022-02-15 02:15:26,321 INFO L226 Difference]: Without dead ends: 613 [2022-02-15 02:15:26,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 35 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:15:26,322 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:26,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 68 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:15:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-15 02:15:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 539. [2022-02-15 02:15:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:28,898 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:28,898 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:28,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:28,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:28,899 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 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 02:15:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-02-15 02:15:28,899 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash -570039651, now seen corresponding path program 195 times [2022-02-15 02:15:28,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:28,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462649398] [2022-02-15 02:15:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:28,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:28,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:28,972 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:29,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:29,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:29,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:29,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:29,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:30,510 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:30,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462649398] [2022-02-15 02:15:30,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [462649398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:30,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:30,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:15:30,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850323274] [2022-02-15 02:15:30,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:15:30,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:15:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:15:30,511 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:35,019 INFO L93 Difference]: Finished difference Result 877 states and 997 transitions. [2022-02-15 02:15:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:15:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:35,019 INFO L225 Difference]: With dead ends: 877 [2022-02-15 02:15:35,020 INFO L226 Difference]: Without dead ends: 610 [2022-02-15 02:15:35,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 34 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:15:35,020 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:35,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 56 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:15:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-15 02:15:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 539. [2022-02-15 02:15:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:37,758 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:37,758 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:37,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 39 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:37,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:37,759 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 14, 7, 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 02:15:37,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-02-15 02:15:37,759 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash -126138977, now seen corresponding path program 196 times [2022-02-15 02:15:37,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:37,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993400299] [2022-02-15 02:15:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:37,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:37,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:37,841 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:37,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:37,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:37,911 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:38,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:38,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:39,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:39,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993400299] [2022-02-15 02:15:39,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993400299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:39,429 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:39,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:15:39,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724169173] [2022-02-15 02:15:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:15:39,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:15:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1710, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:15:39,429 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:44,188 INFO L93 Difference]: Finished difference Result 874 states and 994 transitions. [2022-02-15 02:15:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:15:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:44,189 INFO L225 Difference]: With dead ends: 874 [2022-02-15 02:15:44,189 INFO L226 Difference]: Without dead ends: 607 [2022-02-15 02:15:44,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:15:44,190 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:44,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 90 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:15:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-15 02:15:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 539. [2022-02-15 02:15:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:46,859 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:46,859 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:46,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:46,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:46,859 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 13, 8, 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 02:15:46,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-02-15 02:15:46,860 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -607219235, now seen corresponding path program 197 times [2022-02-15 02:15:46,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:46,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545393297] [2022-02-15 02:15:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:46,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:46,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:46,943 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:46,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:47,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:47,014 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:47,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:47,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:48,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:48,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545393297] [2022-02-15 02:15:48,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [545393297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:48,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:48,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:15:48,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225880104] [2022-02-15 02:15:48,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:48,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:15:48,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:48,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:15:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:15:48,554 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:53,199 INFO L93 Difference]: Finished difference Result 871 states and 991 transitions. [2022-02-15 02:15:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:15:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:15:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:53,200 INFO L225 Difference]: With dead ends: 871 [2022-02-15 02:15:53,200 INFO L226 Difference]: Without dead ends: 604 [2022-02-15 02:15:53,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 32 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:15:53,201 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 88 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:15:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-02-15 02:15:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 539. [2022-02-15 02:15:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:15:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:15:55,867 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:15:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:55,867 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:15:55,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 41 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:15:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:15:55,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:55,868 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 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 02:15:55,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-02-15 02:15:55,868 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash -960307617, now seen corresponding path program 198 times [2022-02-15 02:15:55,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:55,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369698072] [2022-02-15 02:15:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:55,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:55,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:55,955 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:56,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:56,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:56,031 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:15:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:15:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:57,568 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:57,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369698072] [2022-02-15 02:15:57,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [369698072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:57,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:57,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:15:57,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983498936] [2022-02-15 02:15:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:57,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:15:57,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:15:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:15:57,570 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:02,272 INFO L93 Difference]: Finished difference Result 868 states and 988 transitions. [2022-02-15 02:16:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:16:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:02,273 INFO L225 Difference]: With dead ends: 868 [2022-02-15 02:16:02,273 INFO L226 Difference]: Without dead ends: 601 [2022-02-15 02:16:02,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:16:02,274 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:02,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 88 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:16:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-02-15 02:16:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 539. [2022-02-15 02:16:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:04,879 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:04,879 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:04,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:04,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:04,880 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 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 02:16:04,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-02-15 02:16:04,880 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:04,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1285271837, now seen corresponding path program 199 times [2022-02-15 02:16:04,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:04,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221516218] [2022-02-15 02:16:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:04,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:04,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:04,952 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:04,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:05,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:05,036 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:05,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:16:06,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:06,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221516218] [2022-02-15 02:16:06,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221516218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:06,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:06,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:16:06,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844292341] [2022-02-15 02:16:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:06,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:16:06,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:16:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:16:06,586 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:11,128 INFO L93 Difference]: Finished difference Result 865 states and 985 transitions. [2022-02-15 02:16:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:16:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:11,129 INFO L225 Difference]: With dead ends: 865 [2022-02-15 02:16:11,129 INFO L226 Difference]: Without dead ends: 598 [2022-02-15 02:16:11,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:16:11,130 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:11,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 80 Invalid, 3371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3359 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:16:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-15 02:16:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 539. [2022-02-15 02:16:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:13,847 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:13,847 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 43 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:13,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:13,847 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 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 02:16:13,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-02-15 02:16:13,848 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1708918559, now seen corresponding path program 200 times [2022-02-15 02:16:13,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:13,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269740795] [2022-02-15 02:16:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:13,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:13,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:13,931 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:13,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:14,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:14,011 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:16:15,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:15,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269740795] [2022-02-15 02:16:15,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269740795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:15,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:15,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:16:15,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875367610] [2022-02-15 02:16:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:16:15,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:16:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:16:15,574 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 44 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:20,153 INFO L93 Difference]: Finished difference Result 862 states and 982 transitions. [2022-02-15 02:16:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:16:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 44 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:20,154 INFO L225 Difference]: With dead ends: 862 [2022-02-15 02:16:20,154 INFO L226 Difference]: Without dead ends: 595 [2022-02-15 02:16:20,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=2230, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:16:20,155 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:20,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 90 Invalid, 3419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:16:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-15 02:16:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 539. [2022-02-15 02:16:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:22,879 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:22,879 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:22,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 44 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:22,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:22,880 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 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 02:16:22,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-02-15 02:16:22,880 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 679559261, now seen corresponding path program 201 times [2022-02-15 02:16:22,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:22,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163558368] [2022-02-15 02:16:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:22,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:22,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:22,953 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:22,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:23,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:23,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:23,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:16:24,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:24,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163558368] [2022-02-15 02:16:24,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163558368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:24,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:24,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 02:16:24,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380371756] [2022-02-15 02:16:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:24,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 02:16:24,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 02:16:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:16:24,602 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 47 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:28,996 INFO L93 Difference]: Finished difference Result 859 states and 979 transitions. [2022-02-15 02:16:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:16:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:28,997 INFO L225 Difference]: With dead ends: 859 [2022-02-15 02:16:28,997 INFO L226 Difference]: Without dead ends: 592 [2022-02-15 02:16:28,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=227, Invalid=2323, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:16:28,998 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:28,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 2992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:16:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-15 02:16:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 539. [2022-02-15 02:16:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:31,641 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:31,641 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:31,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 45 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:31,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:31,641 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 13, 8, 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 02:16:31,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-02-15 02:16:31,641 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash -164446241, now seen corresponding path program 202 times [2022-02-15 02:16:31,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:31,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156179616] [2022-02-15 02:16:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:31,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:31,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:31,717 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:31,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:31,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:31,784 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:16:33,377 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:33,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156179616] [2022-02-15 02:16:33,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [156179616] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:33,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:33,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:16:33,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099776384] [2022-02-15 02:16:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:16:33,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:16:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:16:33,378 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 46 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:37,868 INFO L93 Difference]: Finished difference Result 856 states and 976 transitions. [2022-02-15 02:16:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 02:16:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 46 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:37,869 INFO L225 Difference]: With dead ends: 856 [2022-02-15 02:16:37,869 INFO L226 Difference]: Without dead ends: 589 [2022-02-15 02:16:37,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:16:37,869 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:37,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 78 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:16:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-15 02:16:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 539. [2022-02-15 02:16:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:40,585 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:40,585 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 46 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:40,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:40,585 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 14, 7, 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 02:16:40,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-02-15 02:16:40,585 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 110313373, now seen corresponding path program 203 times [2022-02-15 02:16:40,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:40,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392128935] [2022-02-15 02:16:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:40,618 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:40,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:40,647 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:40,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:40,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:40,728 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:16:42,346 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:42,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392128935] [2022-02-15 02:16:42,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392128935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:42,346 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:42,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 02:16:42,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489200436] [2022-02-15 02:16:42,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:42,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 02:16:42,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 02:16:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2319, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:16:42,347 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 47 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:46,935 INFO L93 Difference]: Finished difference Result 853 states and 973 transitions. [2022-02-15 02:16:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:16:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 47 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:46,936 INFO L225 Difference]: With dead ends: 853 [2022-02-15 02:16:46,936 INFO L226 Difference]: Without dead ends: 586 [2022-02-15 02:16:46,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=241, Invalid=2515, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:16:46,937 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3848 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 3860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:46,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 97 Invalid, 3860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3848 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:16:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-15 02:16:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 539. [2022-02-15 02:16:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:49,663 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:49,663 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:49,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 47 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:49,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:49,663 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 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 02:16:49,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-02-15 02:16:49,663 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1496516767, now seen corresponding path program 204 times [2022-02-15 02:16:49,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:49,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903800378] [2022-02-15 02:16:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:49,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:49,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:49,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:49,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:49,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:49,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:49,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:49,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:49,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:49,924 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 02:16:51,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:51,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903800378] [2022-02-15 02:16:51,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [903800378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:51,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:51,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 02:16:51,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728266187] [2022-02-15 02:16:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:51,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 02:16:51,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 02:16:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:16:51,467 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 48 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:55,856 INFO L93 Difference]: Finished difference Result 850 states and 970 transitions. [2022-02-15 02:16:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 02:16:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 48 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:16:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:55,857 INFO L225 Difference]: With dead ends: 850 [2022-02-15 02:16:55,857 INFO L226 Difference]: Without dead ends: 583 [2022-02-15 02:16:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:16:55,858 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:55,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 76 Invalid, 3575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:16:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-15 02:16:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 539. [2022-02-15 02:16:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:16:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:16:58,537 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:16:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:58,537 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:16:58,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 48 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:16:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:16:58,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:58,538 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 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 02:16:58,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2022-02-15 02:16:58,538 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1558556381, now seen corresponding path program 205 times [2022-02-15 02:16:58,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:58,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552671240] [2022-02-15 02:16:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:58,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:58,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:58,621 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:58,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:58,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:58,701 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:16:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:16:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:00,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:00,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552671240] [2022-02-15 02:17:00,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552671240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:00,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:00,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 02:17:00,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849884420] [2022-02-15 02:17:00,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:00,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 02:17:00,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 02:17:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:17:00,373 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:04,654 INFO L93 Difference]: Finished difference Result 847 states and 967 transitions. [2022-02-15 02:17:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 02:17:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:17:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:04,654 INFO L225 Difference]: With dead ends: 847 [2022-02-15 02:17:04,654 INFO L226 Difference]: Without dead ends: 580 [2022-02-15 02:17:04,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:17:04,655 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3876 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:04,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 92 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3876 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:17:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-15 02:17:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 539. [2022-02-15 02:17:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:17:07,386 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:17:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:07,386 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:17:07,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:17:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:17:07,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:07,387 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 4, 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 02:17:07,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-02-15 02:17:07,387 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash -246881953, now seen corresponding path program 206 times [2022-02-15 02:17:07,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:07,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264867416] [2022-02-15 02:17:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:07,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:07,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:07,471 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:07,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:07,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:07,532 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:09,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:09,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264867416] [2022-02-15 02:17:09,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264867416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:09,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:09,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 02:17:09,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482808246] [2022-02-15 02:17:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:09,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 02:17:09,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:09,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 02:17:09,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:17:09,195 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 50 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:13,499 INFO L93 Difference]: Finished difference Result 844 states and 964 transitions. [2022-02-15 02:17:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 02:17:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 50 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:17:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:13,500 INFO L225 Difference]: With dead ends: 844 [2022-02-15 02:17:13,500 INFO L226 Difference]: Without dead ends: 577 [2022-02-15 02:17:13,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=262, Invalid=2818, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 02:17:13,501 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 4037 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:13,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 71 Invalid, 4049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4037 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:17:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-15 02:17:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 539. [2022-02-15 02:17:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:17:16,170 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:17:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:17:16,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 50 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:17:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:17:16,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:16,171 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 3, 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 02:17:16,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-02-15 02:17:16,171 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1064530403, now seen corresponding path program 207 times [2022-02-15 02:17:16,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:16,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749873374] [2022-02-15 02:17:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:16,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:16,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:16,236 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:16,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:16,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:16,316 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:16,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:16,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:17,987 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:17,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749873374] [2022-02-15 02:17:17,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749873374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:17,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:17,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 02:17:17,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096996350] [2022-02-15 02:17:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:17,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 02:17:17,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 02:17:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2711, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:17:17,988 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 51 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:22,351 INFO L93 Difference]: Finished difference Result 841 states and 961 transitions. [2022-02-15 02:17:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 02:17:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 51 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:17:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:22,352 INFO L225 Difference]: With dead ends: 841 [2022-02-15 02:17:22,352 INFO L226 Difference]: Without dead ends: 574 [2022-02-15 02:17:22,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=2923, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:17:22,353 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:22,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 89 Invalid, 4166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4154 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:17:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-15 02:17:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 539. [2022-02-15 02:17:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:17:25,069 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:17:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:25,069 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:17:25,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 51 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:17:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:17:25,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:25,070 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 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 02:17:25,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-02-15 02:17:25,070 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1642088991, now seen corresponding path program 208 times [2022-02-15 02:17:25,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:25,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618999937] [2022-02-15 02:17:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:25,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:25,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:25,157 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:25,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:25,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:25,228 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:25,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:25,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:25,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:26,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:26,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618999937] [2022-02-15 02:17:26,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618999937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:26,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:26,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 02:17:26,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157805264] [2022-02-15 02:17:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:26,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 02:17:26,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 02:17:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2814, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 02:17:26,946 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 52 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:31,240 INFO L93 Difference]: Finished difference Result 839 states and 959 transitions. [2022-02-15 02:17:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 02:17:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 52 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:17:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:31,240 INFO L225 Difference]: With dead ends: 839 [2022-02-15 02:17:31,240 INFO L226 Difference]: Without dead ends: 572 [2022-02-15 02:17:31,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=276, Invalid=3030, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 02:17:31,241 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 4301 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:31,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 73 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4301 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:17:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-15 02:17:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 539. [2022-02-15 02:17:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 524 states have (on average 1.133587786259542) internal successors, (594), 527 states have internal predecessors, (594), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 611 transitions. [2022-02-15 02:17:33,905 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 611 transitions. Word has length 85 [2022-02-15 02:17:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:33,905 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 611 transitions. [2022-02-15 02:17:33,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 52 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 611 transitions. [2022-02-15 02:17:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:17:33,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:33,906 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 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 02:17:33,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2022-02-15 02:17:33,906 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash 630971741, now seen corresponding path program 209 times [2022-02-15 02:17:33,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:33,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667724075] [2022-02-15 02:17:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:33,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:33,945 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:17:33,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:34,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:34,022 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:34,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:34,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:35,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:35,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667724075] [2022-02-15 02:17:35,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [667724075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:35,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:35,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 02:17:35,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245205520] [2022-02-15 02:17:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:35,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 02:17:35,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 02:17:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2918, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:17:35,777 INFO L87 Difference]: Start difference. First operand 539 states and 611 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 53 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:40,169 INFO L93 Difference]: Finished difference Result 852 states and 976 transitions. [2022-02-15 02:17:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 02:17:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 53 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:17:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:40,170 INFO L225 Difference]: With dead ends: 852 [2022-02-15 02:17:40,171 INFO L226 Difference]: Without dead ends: 585 [2022-02-15 02:17:40,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=314, Invalid=3592, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:17:40,172 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3938 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:40,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 72 Invalid, 3956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3938 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:17:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-15 02:17:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 542. [2022-02-15 02:17:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 527 states have (on average 1.1366223908918407) internal successors, (599), 530 states have internal predecessors, (599), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 616 transitions. [2022-02-15 02:17:42,889 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 616 transitions. Word has length 85 [2022-02-15 02:17:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:42,889 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 616 transitions. [2022-02-15 02:17:42,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 53 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 616 transitions. [2022-02-15 02:17:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 02:17:42,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:42,890 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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] [2022-02-15 02:17:42,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2022-02-15 02:17:42,890 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1110998131, now seen corresponding path program 9 times [2022-02-15 02:17:42,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:42,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204239030] [2022-02-15 02:17:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:42,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:42,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:42,989 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:43,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:43,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204239030] [2022-02-15 02:17:43,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204239030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:43,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:43,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:17:43,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497869509] [2022-02-15 02:17:43,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:43,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:17:43,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:17:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:17:43,315 INFO L87 Difference]: Start difference. First operand 542 states and 616 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:17:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:46,556 INFO L93 Difference]: Finished difference Result 888 states and 1023 transitions. [2022-02-15 02:17:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:17:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 87 [2022-02-15 02:17:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:46,557 INFO L225 Difference]: With dead ends: 888 [2022-02-15 02:17:46,557 INFO L226 Difference]: Without dead ends: 612 [2022-02-15 02:17:46,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:17:46,557 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 31 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:17:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-15 02:17:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 569. [2022-02-15 02:17:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 554 states have (on average 1.135379061371841) internal successors, (629), 557 states have internal predecessors, (629), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 646 transitions. [2022-02-15 02:17:49,239 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 646 transitions. Word has length 87 [2022-02-15 02:17:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:49,239 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 646 transitions. [2022-02-15 02:17:49,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:17:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 646 transitions. [2022-02-15 02:17:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 02:17:49,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:49,240 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 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 02:17:49,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2022-02-15 02:17:49,240 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1492238652, now seen corresponding path program 210 times [2022-02-15 02:17:49,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:49,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282591527] [2022-02-15 02:17:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:49,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:49,334 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:49,334 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:49,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:49,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:49,418 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:49,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:51,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:51,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282591527] [2022-02-15 02:17:51,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282591527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:51,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:51,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:17:51,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13163437] [2022-02-15 02:17:51,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:51,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:17:51,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:17:51,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:17:51,008 INFO L87 Difference]: Start difference. First operand 569 states and 646 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:55,260 INFO L93 Difference]: Finished difference Result 918 states and 1050 transitions. [2022-02-15 02:17:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:17:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-02-15 02:17:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:55,262 INFO L225 Difference]: With dead ends: 918 [2022-02-15 02:17:55,262 INFO L226 Difference]: Without dead ends: 624 [2022-02-15 02:17:55,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 6 SyntacticMatches, 39 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:17:55,263 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:55,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 63 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:17:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-02-15 02:17:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 572. [2022-02-15 02:17:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 557 states have (on average 1.1364452423698383) internal successors, (633), 560 states have internal predecessors, (633), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:17:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 650 transitions. [2022-02-15 02:17:57,940 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 650 transitions. Word has length 88 [2022-02-15 02:17:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:57,940 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 650 transitions. [2022-02-15 02:17:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:17:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 650 transitions. [2022-02-15 02:17:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 02:17:57,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:57,941 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 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 02:17:57,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2022-02-15 02:17:57,941 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash -284458628, now seen corresponding path program 2 times [2022-02-15 02:17:57,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:57,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076021248] [2022-02-15 02:17:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:57,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:58,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:58,005 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:58,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:58,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:58,077 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:17:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:58,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:17:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:17:59,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:59,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076021248] [2022-02-15 02:17:59,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076021248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:59,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:59,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:17:59,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911134011] [2022-02-15 02:17:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:59,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:17:59,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:17:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:17:59,535 INFO L87 Difference]: Start difference. First operand 572 states and 650 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:18:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:18:03,898 INFO L93 Difference]: Finished difference Result 617 states and 698 transitions. [2022-02-15 02:18:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:18:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-02-15 02:18:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:18:03,899 INFO L225 Difference]: With dead ends: 617 [2022-02-15 02:18:03,899 INFO L226 Difference]: Without dead ends: 615 [2022-02-15 02:18:03,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 6 SyntacticMatches, 39 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:18:03,900 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3391 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:18:03,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 101 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:18:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-02-15 02:18:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 575. [2022-02-15 02:18:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 560 states have (on average 1.1375) internal successors, (637), 563 states have internal predecessors, (637), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 02:18:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 654 transitions. [2022-02-15 02:18:06,641 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 654 transitions. Word has length 88 [2022-02-15 02:18:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:18:06,641 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 654 transitions. [2022-02-15 02:18:06,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 36 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:18:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 654 transitions. [2022-02-15 02:18:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 02:18:06,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:18:06,642 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 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 02:18:06,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2022-02-15 02:18:06,642 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:18:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:18:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1478828156, now seen corresponding path program 211 times [2022-02-15 02:18:06,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:18:06,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322348182] [2022-02-15 02:18:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:18:06,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:06,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:06,720 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:18:06,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:06,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:06,796 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:18:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:18:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:06,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:18:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:06,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:18:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:18:08,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:18:08,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322348182] [2022-02-15 02:18:08,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [322348182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:18:08,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:18:08,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:18:08,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061971282] [2022-02-15 02:18:08,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:18:08,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:18:08,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:18:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:18:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1559, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:18:08,392 INFO L87 Difference]: Start difference. First operand 575 states and 654 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 38 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:18:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:18:13,426 INFO L93 Difference]: Finished difference Result 955 states and 1087 transitions. [2022-02-15 02:18:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:18:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 38 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-02-15 02:18:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:18:13,427 INFO L225 Difference]: With dead ends: 955 [2022-02-15 02:18:13,427 INFO L226 Difference]: Without dead ends: 661 [2022-02-15 02:18:13,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 38 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:18:13,428 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:18:13,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 56 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:18:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states.