/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:46:16,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:46:16,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:46:16,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:46:16,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:46:16,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:46:16,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:46:16,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:46:16,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:46:16,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:46:16,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:46:16,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:46:16,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:46:16,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:46:16,073 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:46:16,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:46:16,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:46:16,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:46:16,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:46:16,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:46:16,352 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:46:16,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-24 03:46:16,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2d9c892/ac7d62e2728b47a0a91c258d682dc33c/FLAG49812bb8a [2022-02-24 03:46:16,817 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:46:16,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-24 03:46:16,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2d9c892/ac7d62e2728b47a0a91c258d682dc33c/FLAG49812bb8a [2022-02-24 03:46:16,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2d9c892/ac7d62e2728b47a0a91c258d682dc33c [2022-02-24 03:46:16,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:46:16,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:46:16,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:46:16,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:46:16,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:46:16,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:46:16" (1/1) ... [2022-02-24 03:46:16,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40749816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:16, skipping insertion in model container [2022-02-24 03:46:16,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:46:16" (1/1) ... [2022-02-24 03:46:16,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:46:16,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:46:17,068 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/mono-crafted_6.c[318,331] [2022-02-24 03:46:17,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:46:17,133 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:46:17,148 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/mono-crafted_6.c[318,331] [2022-02-24 03:46:17,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:46:17,160 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:46:17,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17 WrapperNode [2022-02-24 03:46:17,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:46:17,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:46:17,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:46:17,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:46:17,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:46:17,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:46:17,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:46:17,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:46:17,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (1/1) ... [2022-02-24 03:46:17,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:46:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:46:17,216 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) [2022-02-24 03:46:17,232 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 [2022-02-24 03:46:17,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:46:17,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:46:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:46:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:46:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:46:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:46:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:46:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:46:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:46:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:46:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:46:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:46:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:46:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:46:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:46:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:46:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:46:17,324 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:46:17,327 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:46:17,434 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:46:17,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:46:17,443 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 03:46:17,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:46:17 BoogieIcfgContainer [2022-02-24 03:46:17,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:46:17,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:46:17,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:46:17,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:46:17,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:46:16" (1/3) ... [2022-02-24 03:46:17,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f33f584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:46:17, skipping insertion in model container [2022-02-24 03:46:17,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:17" (2/3) ... [2022-02-24 03:46:17,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f33f584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:46:17, skipping insertion in model container [2022-02-24 03:46:17,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:46:17" (3/3) ... [2022-02-24 03:46:17,464 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-02-24 03:46:17,468 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:46:17,468 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:46:17,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:46:17,545 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=QVASR [2022-02-24 03:46:17,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:46:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:46:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:46:17,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:17,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:17,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 1 times [2022-02-24 03:46:17,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:17,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920104269] [2022-02-24 03:46:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:17,616 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:46:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:17,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:17,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920104269] [2022-02-24 03:46:17,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920104269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:17,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:17,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:46:17,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572640159] [2022-02-24 03:46:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:17,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:46:17,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:17,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:46:17,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:46:17,806 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:17,867 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-02-24 03:46:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:46:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-24 03:46:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:17,874 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:46:17,874 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:46:17,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:46:17,878 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:17,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:46:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 03:46:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-24 03:46:17,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-24 03:46:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-24 03:46:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-24 03:46:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 03:46:17,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:17,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:17,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:46:17,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 1 times [2022-02-24 03:46:17,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:17,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715537952] [2022-02-24 03:46:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:17,983 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:18,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:18,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715537952] [2022-02-24 03:46:18,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715537952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:18,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:18,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:46:18,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965374874] [2022-02-24 03:46:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:18,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:46:18,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:46:18,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:46:18,141 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:18,211 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-02-24 03:46:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:46:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-24 03:46:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:18,213 INFO L225 Difference]: With dead ends: 29 [2022-02-24 03:46:18,213 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:46:18,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:46:18,218 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:18,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:46:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:46:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-24 03:46:18,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-02-24 03:46:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:18,227 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-24 03:46:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-24 03:46:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:46:18,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:18,228 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:46:18,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash -88759266, now seen corresponding path program 1 times [2022-02-24 03:46:18,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:18,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85356485] [2022-02-24 03:46:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:18,286 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:18,479 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:18,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:18,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85356485] [2022-02-24 03:46:18,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85356485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:18,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:18,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:46:18,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964107950] [2022-02-24 03:46:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:18,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:46:18,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:46:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:46:18,642 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:18,749 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-02-24 03:46:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:46:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:46:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:18,751 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:46:18,751 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:46:18,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:46:18,753 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:18,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 35 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:46:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 03:46:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-24 03:46:18,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-02-24 03:46:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:18,760 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-24 03:46:18,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-24 03:46:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:46:18,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:18,761 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:18,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:46:18,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash 236661621, now seen corresponding path program 2 times [2022-02-24 03:46:18,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:18,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677561423] [2022-02-24 03:46:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:19,016 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,151 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:19,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:19,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677561423] [2022-02-24 03:46:19,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677561423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:19,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:19,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:46:19,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995287069] [2022-02-24 03:46:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:19,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:46:19,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:46:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:46:19,322 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:19,429 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-02-24 03:46:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:46:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 03:46:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:19,430 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:46:19,431 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 03:46:19,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:46:19,438 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:19,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 41 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 03:46:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 03:46:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-24 03:46:19,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2022-02-24 03:46:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:19,447 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-24 03:46:19,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-24 03:46:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:46:19,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:19,449 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:46:19,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1513041740, now seen corresponding path program 3 times [2022-02-24 03:46:19,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:19,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905283450] [2022-02-24 03:46:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:19,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:19,623 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,788 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:19,908 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:19,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905283450] [2022-02-24 03:46:19,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [905283450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:19,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:19,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:46:19,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069790986] [2022-02-24 03:46:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:19,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:46:19,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:19,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:46:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:46:19,910 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:20,059 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-02-24 03:46:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:46:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:46:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:20,060 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:46:20,061 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:46:20,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:46:20,062 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:20,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:46:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 03:46:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-24 03:46:20,067 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-02-24 03:46:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:20,068 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-24 03:46:20,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-24 03:46:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:46:20,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:20,069 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:20,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:46:20,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1302368349, now seen corresponding path program 4 times [2022-02-24 03:46:20,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:20,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215365896] [2022-02-24 03:46:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:20,266 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:20,449 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:20,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:20,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215365896] [2022-02-24 03:46:20,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [215365896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:20,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:20,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:46:20,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357050684] [2022-02-24 03:46:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:20,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:46:20,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:46:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:46:20,653 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:20,822 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-02-24 03:46:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:46:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:46:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:20,823 INFO L225 Difference]: With dead ends: 45 [2022-02-24 03:46:20,823 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:46:20,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:46:20,824 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:20,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:46:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 03:46:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-24 03:46:20,830 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-02-24 03:46:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:20,830 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-24 03:46:20,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-24 03:46:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:46:20,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:20,831 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:46:20,832 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash -46551942, now seen corresponding path program 5 times [2022-02-24 03:46:20,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:20,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211841398] [2022-02-24 03:46:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:21,025 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,163 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:21,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:21,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211841398] [2022-02-24 03:46:21,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211841398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:21,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:21,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:46:21,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443124710] [2022-02-24 03:46:21,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:21,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:46:21,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:46:21,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:46:21,319 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:21,500 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-02-24 03:46:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:46:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 03:46:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:21,501 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:46:21,501 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:46:21,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:46:21,502 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:21,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 59 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:46:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 03:46:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-02-24 03:46:21,507 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-02-24 03:46:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:21,507 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-02-24 03:46:21,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-02-24 03:46:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:46:21,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:21,508 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:21,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:46:21,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1536449071, now seen corresponding path program 6 times [2022-02-24 03:46:21,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:21,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156817998] [2022-02-24 03:46:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:21,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:21,676 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,833 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:22,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:22,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156817998] [2022-02-24 03:46:22,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156817998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:22,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:22,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:46:22,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104532897] [2022-02-24 03:46:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:22,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:46:22,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:46:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:46:22,009 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:22,236 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-02-24 03:46:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:46:22,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:46:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:22,238 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:46:22,238 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:46:22,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:46:22,239 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:22,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:46:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 03:46:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-02-24 03:46:22,245 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-02-24 03:46:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:22,245 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-02-24 03:46:22,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-02-24 03:46:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:46:22,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:22,246 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:22,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:46:22,246 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash 79895464, now seen corresponding path program 7 times [2022-02-24 03:46:22,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:22,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428550690] [2022-02-24 03:46:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:22,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:22,444 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:22,613 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:22,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:22,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:22,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428550690] [2022-02-24 03:46:22,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428550690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:22,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:22,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:46:22,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109021037] [2022-02-24 03:46:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:22,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:46:22,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:46:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:46:22,819 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:23,080 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-02-24 03:46:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:46:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:46:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:23,081 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:46:23,081 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 03:46:23,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:46:23,082 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 71 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 03:46:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 03:46:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-02-24 03:46:23,086 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-02-24 03:46:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:23,086 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-02-24 03:46:23,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-02-24 03:46:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 03:46:23,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:23,087 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:23,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:46:23,087 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -567423489, now seen corresponding path program 8 times [2022-02-24 03:46:23,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:23,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60024141] [2022-02-24 03:46:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:23,214 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:23,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:23,539 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:23,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60024141] [2022-02-24 03:46:23,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [60024141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:23,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:23,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:46:23,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883925579] [2022-02-24 03:46:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:46:23,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:46:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:46:23,541 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:23,857 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-02-24 03:46:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:46:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 03:46:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:23,858 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:46:23,858 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:46:23,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:46:23,859 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:23,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 72 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:46:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 03:46:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-02-24 03:46:23,863 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-02-24 03:46:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-02-24 03:46:23,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-02-24 03:46:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:46:23,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:23,864 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:46:23,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1011254058, now seen corresponding path program 9 times [2022-02-24 03:46:23,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:23,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115152237] [2022-02-24 03:46:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:24,041 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,190 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:24,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:24,368 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:24,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115152237] [2022-02-24 03:46:24,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115152237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:24,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:24,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:46:24,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145999443] [2022-02-24 03:46:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:46:24,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:46:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:46:24,370 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:24,641 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-02-24 03:46:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:46:24,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-24 03:46:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:24,643 INFO L225 Difference]: With dead ends: 65 [2022-02-24 03:46:24,643 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:46:24,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:46:24,644 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:24,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 78 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:46:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 03:46:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-02-24 03:46:24,651 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-02-24 03:46:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:24,651 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-02-24 03:46:24,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-02-24 03:46:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:46:24,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:24,652 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:24,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:46:24,652 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1953241043, now seen corresponding path program 10 times [2022-02-24 03:46:24,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:24,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189221823] [2022-02-24 03:46:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:24,836 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,970 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:25,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:25,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189221823] [2022-02-24 03:46:25,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [189221823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:25,183 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:25,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:46:25,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739978894] [2022-02-24 03:46:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:25,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:46:25,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:46:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:46:25,184 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:25,548 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-02-24 03:46:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:46:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 03:46:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:25,549 INFO L225 Difference]: With dead ends: 69 [2022-02-24 03:46:25,549 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:46:25,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:46:25,550 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:25,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 89 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:46:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:46:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-02-24 03:46:25,554 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-02-24 03:46:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:25,555 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-02-24 03:46:25,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-02-24 03:46:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 03:46:25,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:25,555 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:25,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:46:25,556 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1089810428, now seen corresponding path program 11 times [2022-02-24 03:46:25,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:25,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398058491] [2022-02-24 03:46:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:25,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:25,884 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:26,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:26,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398058491] [2022-02-24 03:46:26,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398058491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:26,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:26,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:46:26,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39969304] [2022-02-24 03:46:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:26,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:46:26,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:46:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:46:26,139 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:26,532 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-02-24 03:46:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:46:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 03:46:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:26,534 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:46:26,534 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 03:46:26,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:46:26,538 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:26,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 03:46:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-24 03:46:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-02-24 03:46:26,544 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-02-24 03:46:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:26,545 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-02-24 03:46:26,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-02-24 03:46:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 03:46:26,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:26,546 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:26,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:46:26,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash 176944219, now seen corresponding path program 12 times [2022-02-24 03:46:26,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:26,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123344658] [2022-02-24 03:46:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:26,692 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:26,868 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:26,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:27,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:27,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123344658] [2022-02-24 03:46:27,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [123344658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:27,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:27,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:46:27,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224438667] [2022-02-24 03:46:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:46:27,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:46:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:46:27,131 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:27,605 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-02-24 03:46:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:46:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 03:46:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:27,606 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:46:27,606 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:46:27,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:46:27,607 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:27,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 101 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:46:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:46:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 03:46:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-02-24 03:46:27,611 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-02-24 03:46:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:27,611 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-02-24 03:46:27,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-02-24 03:46:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:46:27,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:27,612 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:27,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:46:27,612 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:27,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1381690062, now seen corresponding path program 13 times [2022-02-24 03:46:27,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:27,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915617864] [2022-02-24 03:46:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:27,778 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:27,957 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:28,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:28,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915617864] [2022-02-24 03:46:28,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [915617864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:28,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:28,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:46:28,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771090534] [2022-02-24 03:46:28,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:28,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:46:28,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:46:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:46:28,249 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:28,854 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-02-24 03:46:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:46:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-24 03:46:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:28,855 INFO L225 Difference]: With dead ends: 81 [2022-02-24 03:46:28,855 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 03:46:28,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:46:28,857 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:28,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 03:46:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 03:46:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-02-24 03:46:28,862 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-02-24 03:46:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:28,863 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-02-24 03:46:28,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-02-24 03:46:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:46:28,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:28,864 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:28,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:46:28,864 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -352062839, now seen corresponding path program 14 times [2022-02-24 03:46:28,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:28,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250775511] [2022-02-24 03:46:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:29,059 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,196 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:29,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:29,448 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:29,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250775511] [2022-02-24 03:46:29,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250775511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:29,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:29,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:46:29,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959759800] [2022-02-24 03:46:29,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:29,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:46:29,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:46:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:46:29,450 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:29,990 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-02-24 03:46:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:46:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 03:46:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:29,991 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:46:29,991 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 03:46:29,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:46:29,992 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:29,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 113 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 03:46:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 03:46:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-02-24 03:46:29,998 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-02-24 03:46:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:29,998 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-02-24 03:46:29,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-02-24 03:46:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 03:46:29,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:29,999 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:29,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:46:29,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2021018720, now seen corresponding path program 15 times [2022-02-24 03:46:30,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:30,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487615748] [2022-02-24 03:46:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:30,151 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:30,290 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:30,577 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:30,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487615748] [2022-02-24 03:46:30,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [487615748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:30,577 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:30,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:46:30,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958004414] [2022-02-24 03:46:30,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:30,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:46:30,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:46:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:46:30,579 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:31,161 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-02-24 03:46:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:46:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 03:46:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:31,162 INFO L225 Difference]: With dead ends: 89 [2022-02-24 03:46:31,162 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:46:31,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=1556, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:46:31,163 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:31,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 114 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:46:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:46:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-02-24 03:46:31,167 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-02-24 03:46:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:31,167 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-02-24 03:46:31,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-02-24 03:46:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 03:46:31,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:31,167 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:31,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:46:31,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -286661961, now seen corresponding path program 16 times [2022-02-24 03:46:31,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:31,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030383348] [2022-02-24 03:46:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:31,346 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:31,488 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:31,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:31,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030383348] [2022-02-24 03:46:31,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1030383348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:31,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:31,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:46:31,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417084757] [2022-02-24 03:46:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:31,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:46:31,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:46:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:46:31,830 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:32,693 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-02-24 03:46:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:46:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-24 03:46:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:32,694 INFO L225 Difference]: With dead ends: 93 [2022-02-24 03:46:32,694 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 03:46:32,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:46:32,696 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:32,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 120 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 03:46:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-24 03:46:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-02-24 03:46:32,702 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-02-24 03:46:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:32,702 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-02-24 03:46:32,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-02-24 03:46:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 03:46:32,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:32,703 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:32,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:46:32,703 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash 980186510, now seen corresponding path program 17 times [2022-02-24 03:46:32,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:32,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820085753] [2022-02-24 03:46:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:32,961 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:33,125 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:33,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:33,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820085753] [2022-02-24 03:46:33,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820085753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:33,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:33,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:46:33,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100728969] [2022-02-24 03:46:33,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:33,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:46:33,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:46:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:46:33,430 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:34,122 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-02-24 03:46:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:46:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-24 03:46:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:34,123 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:46:34,123 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 03:46:34,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:46:34,124 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:34,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 126 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:46:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 03:46:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 03:46:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-02-24 03:46:34,128 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-02-24 03:46:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:34,128 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-02-24 03:46:34,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-02-24 03:46:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 03:46:34,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:34,129 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:34,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:46:34,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 170640613, now seen corresponding path program 18 times [2022-02-24 03:46:34,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:34,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228224811] [2022-02-24 03:46:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:34,285 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,406 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:34,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:34,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228224811] [2022-02-24 03:46:34,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [228224811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:34,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:34,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:46:34,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329841511] [2022-02-24 03:46:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:34,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:46:34,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:46:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:46:34,638 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:35,257 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-02-24 03:46:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:46:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-24 03:46:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:35,263 INFO L225 Difference]: With dead ends: 101 [2022-02-24 03:46:35,263 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:46:35,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=2066, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:46:35,264 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:35,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 137 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:46:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-02-24 03:46:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-02-24 03:46:35,269 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-02-24 03:46:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:35,270 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-02-24 03:46:35,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-02-24 03:46:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:46:35,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:35,270 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:35,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:46:35,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1081446588, now seen corresponding path program 19 times [2022-02-24 03:46:35,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:35,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757774451] [2022-02-24 03:46:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:35,421 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,615 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:35,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:35,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757774451] [2022-02-24 03:46:35,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [757774451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:35,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:35,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:46:35,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836618844] [2022-02-24 03:46:35,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:46:35,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:46:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:46:35,996 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:36,670 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2022-02-24 03:46:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:46:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-24 03:46:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:36,672 INFO L225 Difference]: With dead ends: 105 [2022-02-24 03:46:36,672 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 03:46:36,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:46:36,674 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:36,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 138 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 03:46:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-24 03:46:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-02-24 03:46:36,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-02-24 03:46:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:36,679 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-02-24 03:46:36,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-02-24 03:46:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 03:46:36,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:36,680 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:36,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:46:36,681 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1656199443, now seen corresponding path program 20 times [2022-02-24 03:46:36,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:36,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032134540] [2022-02-24 03:46:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:36,814 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,935 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:37,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:37,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032134540] [2022-02-24 03:46:37,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032134540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:37,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:37,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:46:37,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130791179] [2022-02-24 03:46:37,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:37,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:46:37,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:46:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:46:37,249 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:37,927 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-02-24 03:46:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:46:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 03:46:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:37,929 INFO L225 Difference]: With dead ends: 109 [2022-02-24 03:46:37,929 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:46:37,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=2446, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:46:37,931 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:37,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 144 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:46:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:46:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 03:46:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-02-24 03:46:37,941 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-02-24 03:46:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:37,941 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-02-24 03:46:37,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-02-24 03:46:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 03:46:37,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:37,963 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:37,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:46:37,964 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 159358442, now seen corresponding path program 21 times [2022-02-24 03:46:37,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:37,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560963730] [2022-02-24 03:46:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:37,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:38,078 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:38,193 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:38,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:38,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560963730] [2022-02-24 03:46:38,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560963730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:38,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:38,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:46:38,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572541362] [2022-02-24 03:46:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:38,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:46:38,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:46:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:46:38,586 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:39,530 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2022-02-24 03:46:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:46:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-24 03:46:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:39,531 INFO L225 Difference]: With dead ends: 113 [2022-02-24 03:46:39,531 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:46:39,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:46:39,532 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:39,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 150 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:46:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-24 03:46:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-02-24 03:46:39,536 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-02-24 03:46:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-02-24 03:46:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-02-24 03:46:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 03:46:39,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:39,537 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:46:39,537 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1350262593, now seen corresponding path program 22 times [2022-02-24 03:46:39,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:39,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825865432] [2022-02-24 03:46:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:39,649 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,732 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:39,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:40,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:40,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825865432] [2022-02-24 03:46:40,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [825865432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:40,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:40,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:46:40,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279364269] [2022-02-24 03:46:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:46:40,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:40,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:46:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:46:40,223 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:41,074 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2022-02-24 03:46:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:46:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-24 03:46:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:41,075 INFO L225 Difference]: With dead ends: 117 [2022-02-24 03:46:41,075 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 03:46:41,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=2858, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:46:41,076 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:41,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 161 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 03:46:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-02-24 03:46:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-02-24 03:46:41,080 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-02-24 03:46:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-02-24 03:46:41,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-02-24 03:46:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 03:46:41,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:41,081 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:41,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:46:41,081 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1182309656, now seen corresponding path program 23 times [2022-02-24 03:46:41,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:41,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837580109] [2022-02-24 03:46:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:41,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:41,215 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:41,298 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:41,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:41,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:41,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837580109] [2022-02-24 03:46:41,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [837580109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:41,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:41,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:46:41,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252308294] [2022-02-24 03:46:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:46:41,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:46:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:46:41,721 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:42,855 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2022-02-24 03:46:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:46:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-02-24 03:46:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:42,856 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:46:42,856 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 03:46:42,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:46:42,857 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 86 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:42,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 162 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 03:46:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-02-24 03:46:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-02-24 03:46:42,861 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-02-24 03:46:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:42,861 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-02-24 03:46:42,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-02-24 03:46:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 03:46:42,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:42,862 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:42,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:46:42,862 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1566906223, now seen corresponding path program 24 times [2022-02-24 03:46:42,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:42,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977014653] [2022-02-24 03:46:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:42,998 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:43,134 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:43,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:43,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:43,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977014653] [2022-02-24 03:46:43,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977014653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:43,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:43,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:46:43,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149499090] [2022-02-24 03:46:43,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:43,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:46:43,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:43,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:46:43,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:46:43,597 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:44,695 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-02-24 03:46:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:46:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-02-24 03:46:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:44,696 INFO L225 Difference]: With dead ends: 125 [2022-02-24 03:46:44,696 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 03:46:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=3302, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:46:44,697 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:44,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 168 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:46:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 03:46:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-02-24 03:46:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-02-24 03:46:44,705 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-02-24 03:46:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:44,705 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-02-24 03:46:44,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-02-24 03:46:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 03:46:44,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:44,706 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:44,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:46:44,706 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash -632385978, now seen corresponding path program 25 times [2022-02-24 03:46:44,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:44,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725599109] [2022-02-24 03:46:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:44,862 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:44,972 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:45,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:45,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725599109] [2022-02-24 03:46:45,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725599109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:45,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:45,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:46:45,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278491707] [2022-02-24 03:46:45,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:46:45,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:46:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:46:45,437 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:46,934 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-02-24 03:46:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:46:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-24 03:46:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:46,936 INFO L225 Difference]: With dead ends: 129 [2022-02-24 03:46:46,936 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 03:46:46,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=3536, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:46:46,938 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3140 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:46,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 179 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3140 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:46:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 03:46:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-24 03:46:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-02-24 03:46:46,954 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-02-24 03:46:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:46,955 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-02-24 03:46:46,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-02-24 03:46:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 03:46:46,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:46,956 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:46,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:46:46,957 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1164099997, now seen corresponding path program 26 times [2022-02-24 03:46:46,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:46,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842076023] [2022-02-24 03:46:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:46,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:47,117 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:47,268 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:47,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:47,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842076023] [2022-02-24 03:46:47,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842076023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:47,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:47,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:46:47,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906513428] [2022-02-24 03:46:47,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:47,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:46:47,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:46:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:46:47,721 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:48,926 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2022-02-24 03:46:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:46:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-02-24 03:46:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:48,927 INFO L225 Difference]: With dead ends: 133 [2022-02-24 03:46:48,927 INFO L226 Difference]: Without dead ends: 124 [2022-02-24 03:46:48,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=3778, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:46:48,929 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:48,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 180 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-24 03:46:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-02-24 03:46:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-02-24 03:46:48,934 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-02-24 03:46:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:48,934 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-02-24 03:46:48,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-02-24 03:46:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 03:46:48,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:48,935 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:46:48,935 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -638619276, now seen corresponding path program 27 times [2022-02-24 03:46:48,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:48,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717767768] [2022-02-24 03:46:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:49,067 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:49,211 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:49,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:49,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717767768] [2022-02-24 03:46:49,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717767768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:49,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:49,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:46:49,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774759104] [2022-02-24 03:46:49,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:49,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:46:49,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:46:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:46:49,555 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:50,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:50,648 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2022-02-24 03:46:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:46:50,648 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-02-24 03:46:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:50,649 INFO L225 Difference]: With dead ends: 137 [2022-02-24 03:46:50,649 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 03:46:50,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=4028, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:46:50,650 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:50,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 191 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 03:46:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-02-24 03:46:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-02-24 03:46:50,655 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-02-24 03:46:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:50,655 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-02-24 03:46:50,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-02-24 03:46:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-24 03:46:50,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:50,655 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:50,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:46:50,656 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -161325621, now seen corresponding path program 28 times [2022-02-24 03:46:50,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:50,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012038697] [2022-02-24 03:46:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:50,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:50,778 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:50,922 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:51,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:51,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012038697] [2022-02-24 03:46:51,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012038697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:51,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:51,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:46:51,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918055083] [2022-02-24 03:46:51,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:51,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:46:51,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:46:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:46:51,561 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:53,366 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-02-24 03:46:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:46:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-02-24 03:46:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:53,367 INFO L225 Difference]: With dead ends: 141 [2022-02-24 03:46:53,367 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 03:46:53,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=4286, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:46:53,368 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3848 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:53,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 197 Invalid, 3884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3848 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:46:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 03:46:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-24 03:46:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-02-24 03:46:53,374 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-02-24 03:46:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:53,374 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-02-24 03:46:53,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-02-24 03:46:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 03:46:53,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:53,375 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:53,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:46:53,376 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1941354846, now seen corresponding path program 29 times [2022-02-24 03:46:53,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:53,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861343631] [2022-02-24 03:46:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:53,528 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:53,672 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:54,253 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:54,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861343631] [2022-02-24 03:46:54,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861343631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:54,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:54,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:46:54,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398056219] [2022-02-24 03:46:54,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:54,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:46:54,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:46:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:46:54,255 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:56,088 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2022-02-24 03:46:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:46:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-02-24 03:46:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:56,089 INFO L225 Difference]: With dead ends: 145 [2022-02-24 03:46:56,089 INFO L226 Difference]: Without dead ends: 136 [2022-02-24 03:46:56,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=4552, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:46:56,090 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 104 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3975 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:56,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 198 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3975 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:46:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-24 03:46:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-02-24 03:46:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-02-24 03:46:56,095 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-02-24 03:46:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:56,095 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-02-24 03:46:56,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-02-24 03:46:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-24 03:46:56,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:56,096 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:56,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:46:56,096 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1873679367, now seen corresponding path program 30 times [2022-02-24 03:46:56,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:56,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290296527] [2022-02-24 03:46:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:56,235 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:56,316 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:56,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:56,780 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:56,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290296527] [2022-02-24 03:46:56,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290296527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:56,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:56,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:46:56,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779820962] [2022-02-24 03:46:56,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:56,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:46:56,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:46:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:46:56,783 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:58,694 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2022-02-24 03:46:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:46:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-02-24 03:46:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:58,704 INFO L225 Difference]: With dead ends: 149 [2022-02-24 03:46:58,704 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 03:46:58,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=4826, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:46:58,705 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 107 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:58,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 204 Invalid, 4269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:46:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 03:46:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 03:46:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-24 03:46:58,709 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 133 [2022-02-24 03:46:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:58,710 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-24 03:46:58,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-24 03:46:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 03:46:58,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:58,710 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:58,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:46:58,710 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1783238096, now seen corresponding path program 31 times [2022-02-24 03:46:58,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:58,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581069642] [2022-02-24 03:46:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:58,870 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:59,009 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:59,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:59,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581069642] [2022-02-24 03:46:59,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [581069642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:59,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:59,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:46:59,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074058775] [2022-02-24 03:46:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:59,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:46:59,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:46:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:46:59,638 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:01,748 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2022-02-24 03:47:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:47:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-02-24 03:47:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:01,750 INFO L225 Difference]: With dead ends: 153 [2022-02-24 03:47:01,750 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 03:47:01,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=5108, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:47:01,751 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 110 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4495 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 4534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:01,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 210 Invalid, 4534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4495 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:47:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 03:47:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-02-24 03:47:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-02-24 03:47:01,757 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 137 [2022-02-24 03:47:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:01,758 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-02-24 03:47:01,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-02-24 03:47:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-24 03:47:01,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:01,758 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:01,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:47:01,759 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1696558119, now seen corresponding path program 32 times [2022-02-24 03:47:01,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:01,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037630780] [2022-02-24 03:47:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:01,961 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,190 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:02,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:02,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037630780] [2022-02-24 03:47:02,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037630780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:02,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:02,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:47:02,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110371479] [2022-02-24 03:47:02,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:47:02,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:47:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:47:02,842 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:04,428 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2022-02-24 03:47:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:47:04,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-02-24 03:47:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:04,430 INFO L225 Difference]: With dead ends: 157 [2022-02-24 03:47:04,430 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 03:47:04,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=5398, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:47:04,431 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 113 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4767 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:04,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 216 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4767 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:47:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 03:47:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-02-24 03:47:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.027972027972028) internal successors, (147), 143 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-02-24 03:47:04,435 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 141 [2022-02-24 03:47:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:04,436 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-02-24 03:47:04,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-02-24 03:47:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 03:47:04,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:04,436 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:47:04,437 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 517981950, now seen corresponding path program 33 times [2022-02-24 03:47:04,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:04,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040993386] [2022-02-24 03:47:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:04,583 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:04,725 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:05,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:05,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040993386] [2022-02-24 03:47:05,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040993386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:05,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:05,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:47:05,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610904081] [2022-02-24 03:47:05,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:05,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:47:05,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:47:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:47:05,413 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:07,394 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2022-02-24 03:47:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:47:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-02-24 03:47:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:07,395 INFO L225 Difference]: With dead ends: 161 [2022-02-24 03:47:07,395 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 03:47:07,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=5696, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:47:07,396 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 116 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5047 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:07,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 222 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 5047 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:47:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 03:47:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-24 03:47:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-02-24 03:47:07,403 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 145 [2022-02-24 03:47:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:07,403 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-02-24 03:47:07,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-02-24 03:47:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 03:47:07,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:07,404 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:07,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:47:07,404 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash -122102187, now seen corresponding path program 34 times [2022-02-24 03:47:07,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:07,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229748279] [2022-02-24 03:47:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:07,604 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:07,765 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:08,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:08,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229748279] [2022-02-24 03:47:08,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229748279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:08,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:08,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 03:47:08,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060124387] [2022-02-24 03:47:08,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:08,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 03:47:08,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 03:47:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:47:08,387 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:10,968 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2022-02-24 03:47:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:47:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-24 03:47:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:10,969 INFO L225 Difference]: With dead ends: 165 [2022-02-24 03:47:10,969 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 03:47:10,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=6002, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:47:10,971 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 119 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5480 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:10,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 233 Invalid, 5522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5480 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:47:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 03:47:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-02-24 03:47:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-02-24 03:47:10,977 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 149 [2022-02-24 03:47:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:10,977 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-02-24 03:47:10,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-02-24 03:47:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-24 03:47:10,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:10,978 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:10,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:47:10,978 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2030538196, now seen corresponding path program 35 times [2022-02-24 03:47:10,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:10,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065245741] [2022-02-24 03:47:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:11,132 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,295 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:11,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:11,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:11,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065245741] [2022-02-24 03:47:11,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065245741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:11,849 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:11,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:47:11,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664187510] [2022-02-24 03:47:11,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:11,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:47:11,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:47:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:47:11,855 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:13,781 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2022-02-24 03:47:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:47:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-02-24 03:47:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:13,782 INFO L225 Difference]: With dead ends: 169 [2022-02-24 03:47:13,783 INFO L226 Difference]: Without dead ends: 160 [2022-02-24 03:47:13,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=6316, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:47:13,784 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5631 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:13,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 234 Invalid, 5674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5631 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:47:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-24 03:47:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-02-24 03:47:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-02-24 03:47:13,791 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 153 [2022-02-24 03:47:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-02-24 03:47:13,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-02-24 03:47:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-24 03:47:13,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:13,792 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:13,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:47:13,792 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash 17580675, now seen corresponding path program 36 times [2022-02-24 03:47:13,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:13,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107464992] [2022-02-24 03:47:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:13,989 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:14,157 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:15,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:15,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107464992] [2022-02-24 03:47:15,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107464992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:15,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:15,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:47:15,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532685987] [2022-02-24 03:47:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:47:15,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:47:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:47:15,123 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:18,056 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2022-02-24 03:47:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:47:18,056 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-02-24 03:47:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:18,057 INFO L225 Difference]: With dead ends: 173 [2022-02-24 03:47:18,057 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 03:47:18,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=334, Invalid=6638, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:47:18,058 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5935 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:18,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 240 Invalid, 5979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5935 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 03:47:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-02-24 03:47:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2022-02-24 03:47:18,069 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 157 [2022-02-24 03:47:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:18,070 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2022-02-24 03:47:18,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2022-02-24 03:47:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-24 03:47:18,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:18,071 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:18,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:47:18,071 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1316876454, now seen corresponding path program 37 times [2022-02-24 03:47:18,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:18,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316401238] [2022-02-24 03:47:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:18,261 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:18,442 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:19,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:19,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316401238] [2022-02-24 03:47:19,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316401238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:19,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:19,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:47:19,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386846561] [2022-02-24 03:47:19,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:19,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:47:19,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:47:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:47:19,117 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:21,445 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2022-02-24 03:47:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:47:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-02-24 03:47:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:21,447 INFO L225 Difference]: With dead ends: 177 [2022-02-24 03:47:21,447 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 03:47:21,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=6968, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:47:21,448 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 6292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 6247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:21,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 246 Invalid, 6292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 6247 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 03:47:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-02-24 03:47:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-02-24 03:47:21,455 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 161 [2022-02-24 03:47:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:21,456 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-02-24 03:47:21,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-02-24 03:47:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-02-24 03:47:21,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:21,457 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:21,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:47:21,457 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1711773873, now seen corresponding path program 38 times [2022-02-24 03:47:21,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:21,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321271311] [2022-02-24 03:47:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:21,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:21,609 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:21,792 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:22,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:22,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321271311] [2022-02-24 03:47:22,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [321271311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:22,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:22,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 03:47:22,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824118178] [2022-02-24 03:47:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 03:47:22,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 03:47:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2022, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:47:22,567 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:24,945 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2022-02-24 03:47:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 03:47:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-02-24 03:47:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:24,947 INFO L225 Difference]: With dead ends: 181 [2022-02-24 03:47:24,947 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 03:47:24,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=350, Invalid=7306, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:47:24,948 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 131 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 6613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:24,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 252 Invalid, 6613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6567 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 03:47:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-02-24 03:47:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-02-24 03:47:24,955 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 165 [2022-02-24 03:47:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:24,955 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-02-24 03:47:24,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-02-24 03:47:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-24 03:47:24,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:24,956 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:24,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:47:24,956 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash -546660728, now seen corresponding path program 39 times [2022-02-24 03:47:24,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:24,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524409343] [2022-02-24 03:47:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:25,136 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:25,266 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:25,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:26,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:26,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524409343] [2022-02-24 03:47:26,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524409343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:26,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:26,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:47:26,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222273735] [2022-02-24 03:47:26,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:26,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:47:26,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:47:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:47:26,160 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:29,074 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2022-02-24 03:47:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:47:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-02-24 03:47:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:29,076 INFO L225 Difference]: With dead ends: 185 [2022-02-24 03:47:29,076 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 03:47:29,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=7652, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:47:29,076 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 134 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7060 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 7060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:29,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 263 Invalid, 7107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 7060 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 03:47:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-02-24 03:47:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2022-02-24 03:47:29,082 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 169 [2022-02-24 03:47:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:29,082 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2022-02-24 03:47:29,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2022-02-24 03:47:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-24 03:47:29,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:29,083 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:29,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:47:29,083 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:29,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1100538079, now seen corresponding path program 40 times [2022-02-24 03:47:29,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:29,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173745781] [2022-02-24 03:47:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:29,233 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:29,321 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:29,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:29,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173745781] [2022-02-24 03:47:29,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173745781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:29,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:29,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 03:47:29,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923661703] [2022-02-24 03:47:29,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:29,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 03:47:29,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 03:47:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:47:29,971 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:32,742 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2022-02-24 03:47:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 03:47:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-02-24 03:47:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:32,743 INFO L225 Difference]: With dead ends: 189 [2022-02-24 03:47:32,743 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 03:47:32,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=366, Invalid=8006, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:47:32,744 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 137 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7231 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:32,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 264 Invalid, 7279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7231 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:47:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 03:47:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-02-24 03:47:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-02-24 03:47:32,749 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 173 [2022-02-24 03:47:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-02-24 03:47:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-02-24 03:47:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-02-24 03:47:32,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:32,750 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:32,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:47:32,750 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2086658122, now seen corresponding path program 41 times [2022-02-24 03:47:32,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:32,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999360055] [2022-02-24 03:47:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:32,913 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:33,088 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:33,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:33,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:33,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999360055] [2022-02-24 03:47:33,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999360055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:33,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:33,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:47:33,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421357348] [2022-02-24 03:47:33,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:47:33,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:47:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2301, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:47:33,904 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:36,211 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2022-02-24 03:47:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:47:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-02-24 03:47:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:36,212 INFO L225 Difference]: With dead ends: 193 [2022-02-24 03:47:36,212 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 03:47:36,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=374, Invalid=8368, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:47:36,215 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 7575 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 7624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 270 Invalid, 7624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7575 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 03:47:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-02-24 03:47:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 179 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-02-24 03:47:36,225 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 177 [2022-02-24 03:47:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:36,226 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-02-24 03:47:36,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-02-24 03:47:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-24 03:47:36,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:36,228 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:36,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:47:36,228 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -542237939, now seen corresponding path program 42 times [2022-02-24 03:47:36,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:36,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217549829] [2022-02-24 03:47:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:36,430 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:36,609 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:37,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:37,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217549829] [2022-02-24 03:47:37,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217549829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:37,748 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:37,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:47:37,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813428867] [2022-02-24 03:47:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:37,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:47:37,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:47:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2398, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:47:37,750 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:41,265 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2022-02-24 03:47:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:47:41,266 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-02-24 03:47:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:41,267 INFO L225 Difference]: With dead ends: 197 [2022-02-24 03:47:41,267 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 03:47:41,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=382, Invalid=8738, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:47:41,268 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 143 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8104 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 8154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:41,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 281 Invalid, 8154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8104 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:47:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 03:47:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-02-24 03:47:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2022-02-24 03:47:41,276 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 181 [2022-02-24 03:47:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:41,276 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2022-02-24 03:47:41,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2022-02-24 03:47:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-24 03:47:41,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:41,277 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:41,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:47:41,278 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1125159652, now seen corresponding path program 43 times [2022-02-24 03:47:41,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:41,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245811146] [2022-02-24 03:47:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:41,446 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:41,571 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:42,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:42,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245811146] [2022-02-24 03:47:42,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245811146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:42,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:42,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:47:42,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174294695] [2022-02-24 03:47:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:42,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:47:42,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:47:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2497, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:47:42,426 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:45,554 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2022-02-24 03:47:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:47:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-02-24 03:47:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:45,556 INFO L225 Difference]: With dead ends: 201 [2022-02-24 03:47:45,556 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 03:47:45,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=9116, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:47:45,557 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8287 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 8287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:45,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 282 Invalid, 8338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 8287 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 03:47:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-02-24 03:47:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 187 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2022-02-24 03:47:45,562 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 185 [2022-02-24 03:47:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:45,562 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2022-02-24 03:47:45,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2022-02-24 03:47:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-02-24 03:47:45,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:45,577 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:45,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:47:45,577 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1103804613, now seen corresponding path program 44 times [2022-02-24 03:47:45,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:45,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769624715] [2022-02-24 03:47:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:45,831 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:45,973 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:46,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:47,185 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:47,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769624715] [2022-02-24 03:47:47,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769624715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:47,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:47,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:47:47,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953913733] [2022-02-24 03:47:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:47,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:47:47,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:47:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2598, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:47:47,186 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:51,024 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2022-02-24 03:47:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:47:51,024 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-02-24 03:47:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:51,025 INFO L225 Difference]: With dead ends: 205 [2022-02-24 03:47:51,025 INFO L226 Difference]: Without dead ends: 196 [2022-02-24 03:47:51,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=398, Invalid=9502, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:47:51,026 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8840 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 8892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 8840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:51,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 293 Invalid, 8892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 8840 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:47:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-24 03:47:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-02-24 03:47:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 191 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-02-24 03:47:51,032 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 189 [2022-02-24 03:47:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-02-24 03:47:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-02-24 03:47:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-02-24 03:47:51,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:51,033 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:51,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:47:51,033 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash -190187502, now seen corresponding path program 45 times [2022-02-24 03:47:51,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:51,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986957831] [2022-02-24 03:47:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:51,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:51,205 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,370 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:52,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:52,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986957831] [2022-02-24 03:47:52,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [986957831] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:52,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:52,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:47:52,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812925181] [2022-02-24 03:47:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:47:52,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:47:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2701, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:47:52,363 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:55,967 INFO L93 Difference]: Finished difference Result 209 states and 217 transitions. [2022-02-24 03:47:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:47:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-02-24 03:47:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:55,968 INFO L225 Difference]: With dead ends: 209 [2022-02-24 03:47:55,968 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 03:47:55,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=406, Invalid=9896, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:47:55,969 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 152 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9031 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 9084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 9031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:55,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 294 Invalid, 9084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 9031 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:47:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 03:47:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-02-24 03:47:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2022-02-24 03:47:55,975 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 193 [2022-02-24 03:47:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:55,975 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2022-02-24 03:47:55,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2022-02-24 03:47:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-24 03:47:55,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:55,976 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:55,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:47:55,976 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1927518871, now seen corresponding path program 46 times [2022-02-24 03:47:55,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:55,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095504726] [2022-02-24 03:47:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:56,077 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:56,211 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:56,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:57,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:57,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095504726] [2022-02-24 03:47:57,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095504726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:57,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:57,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 03:47:57,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590290918] [2022-02-24 03:47:57,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:57,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 03:47:57,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 03:47:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2806, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:47:57,574 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 52 states, 52 states have (on average 3.7115384615384617) internal successors, (193), 51 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:00,830 INFO L93 Difference]: Finished difference Result 213 states and 221 transitions. [2022-02-24 03:48:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:48:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.7115384615384617) internal successors, (193), 51 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-02-24 03:48:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:00,832 INFO L225 Difference]: With dead ends: 213 [2022-02-24 03:48:00,832 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 03:48:00,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=414, Invalid=10298, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:48:00,834 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 155 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 9415 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 9469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 9415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:00,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 300 Invalid, 9469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 9415 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:48:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 03:48:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-02-24 03:48:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.020100502512563) internal successors, (203), 199 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-02-24 03:48:00,844 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 197 [2022-02-24 03:48:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:00,844 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-02-24 03:48:00,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.7115384615384617) internal successors, (193), 51 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-02-24 03:48:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-24 03:48:00,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:00,845 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:00,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:48:00,845 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1587916992, now seen corresponding path program 47 times [2022-02-24 03:48:00,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:00,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852810425] [2022-02-24 03:48:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:01,017 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,163 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:02,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:02,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852810425] [2022-02-24 03:48:02,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [852810425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:02,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:02,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 03:48:02,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945799275] [2022-02-24 03:48:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:02,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 03:48:02,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 03:48:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2913, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:48:02,526 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:06,235 INFO L93 Difference]: Finished difference Result 217 states and 225 transitions. [2022-02-24 03:48:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 03:48:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-02-24 03:48:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:06,242 INFO L225 Difference]: With dead ends: 217 [2022-02-24 03:48:06,242 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 03:48:06,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=422, Invalid=10708, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:48:06,243 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 158 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 10004 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 10059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 10004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:06,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 311 Invalid, 10059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 10004 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:48:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 03:48:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-02-24 03:48:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.019704433497537) internal successors, (207), 203 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-02-24 03:48:06,251 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 201 [2022-02-24 03:48:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:06,251 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-02-24 03:48:06,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-02-24 03:48:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-02-24 03:48:06,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:06,252 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:06,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:48:06,253 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash 777090455, now seen corresponding path program 48 times [2022-02-24 03:48:06,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:06,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167911533] [2022-02-24 03:48:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:06,447 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:06,586 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:06,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:07,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:07,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167911533] [2022-02-24 03:48:07,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167911533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:07,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:07,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:48:07,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024504729] [2022-02-24 03:48:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:07,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:48:07,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:48:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3022, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:48:07,829 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:12,480 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2022-02-24 03:48:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:48:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-02-24 03:48:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:12,482 INFO L225 Difference]: With dead ends: 221 [2022-02-24 03:48:12,482 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 03:48:12,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=430, Invalid=11126, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:48:12,483 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 161 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 10408 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 10464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 10408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:12,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 317 Invalid, 10464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 10408 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:48:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 03:48:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-02-24 03:48:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-02-24 03:48:12,490 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 205 [2022-02-24 03:48:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:12,490 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-02-24 03:48:12,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-02-24 03:48:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-24 03:48:12,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:12,503 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:48:12,503 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2079352722, now seen corresponding path program 49 times [2022-02-24 03:48:12,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:12,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260747578] [2022-02-24 03:48:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:12,689 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:12,896 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:14,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:14,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260747578] [2022-02-24 03:48:14,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [260747578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:14,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:14,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 03:48:14,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142163570] [2022-02-24 03:48:14,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:14,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 03:48:14,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 03:48:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3133, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:48:14,520 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:19,080 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2022-02-24 03:48:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 03:48:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-02-24 03:48:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:19,092 INFO L225 Difference]: With dead ends: 225 [2022-02-24 03:48:19,092 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 03:48:19,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=438, Invalid=11552, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:48:19,094 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 164 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 10820 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 10877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 10820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:19,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 323 Invalid, 10877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 10820 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:48:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 03:48:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-02-24 03:48:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-02-24 03:48:19,103 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 209 [2022-02-24 03:48:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:19,103 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-02-24 03:48:19,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-02-24 03:48:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-24 03:48:19,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:19,105 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:19,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:48:19,105 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:19,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1245546555, now seen corresponding path program 50 times [2022-02-24 03:48:19,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:19,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556266759] [2022-02-24 03:48:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:19,281 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:19,419 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:20,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:20,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556266759] [2022-02-24 03:48:20,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1556266759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:20,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:20,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 03:48:20,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393081126] [2022-02-24 03:48:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:20,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 03:48:20,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 03:48:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3246, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:48:20,394 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:24,010 INFO L93 Difference]: Finished difference Result 229 states and 237 transitions. [2022-02-24 03:48:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:48:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-02-24 03:48:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:24,012 INFO L225 Difference]: With dead ends: 229 [2022-02-24 03:48:24,012 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 03:48:24,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=446, Invalid=11986, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:48:24,015 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 167 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 11240 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 11298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 11240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:24,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 329 Invalid, 11298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 11240 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:48:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 03:48:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-02-24 03:48:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-02-24 03:48:24,024 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 213 [2022-02-24 03:48:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:24,025 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-02-24 03:48:24,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-02-24 03:48:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-02-24 03:48:24,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:24,026 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:24,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:48:24,026 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash 163042204, now seen corresponding path program 51 times [2022-02-24 03:48:24,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:24,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126612675] [2022-02-24 03:48:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:24,277 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:24,422 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:24,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:25,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:25,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126612675] [2022-02-24 03:48:25,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [126612675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:25,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:25,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:48:25,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258365136] [2022-02-24 03:48:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:25,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:48:25,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:48:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3361, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:48:25,644 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:29,599 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2022-02-24 03:48:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:48:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-02-24 03:48:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:29,600 INFO L225 Difference]: With dead ends: 233 [2022-02-24 03:48:29,600 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 03:48:29,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=454, Invalid=12428, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:48:29,602 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 170 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 11455 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 11514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:29,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 330 Invalid, 11514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11455 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:48:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 03:48:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-24 03:48:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2022-02-24 03:48:29,610 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 217 [2022-02-24 03:48:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:29,611 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2022-02-24 03:48:29,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2022-02-24 03:48:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-24 03:48:29,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:29,612 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:29,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:48:29,612 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:29,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1767730163, now seen corresponding path program 52 times [2022-02-24 03:48:29,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:29,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278808889] [2022-02-24 03:48:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:29,823 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:29,975 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:30,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:31,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:31,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278808889] [2022-02-24 03:48:31,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278808889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:31,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:31,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 03:48:31,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695224322] [2022-02-24 03:48:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:31,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 03:48:31,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 03:48:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3478, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:48:31,327 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:36,058 INFO L93 Difference]: Finished difference Result 237 states and 245 transitions. [2022-02-24 03:48:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 03:48:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-02-24 03:48:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:36,060 INFO L225 Difference]: With dead ends: 237 [2022-02-24 03:48:36,060 INFO L226 Difference]: Without dead ends: 228 [2022-02-24 03:48:36,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=462, Invalid=12878, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 03:48:36,061 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 173 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11887 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 11947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:36,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 336 Invalid, 11947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11887 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:48:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-24 03:48:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-02-24 03:48:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-02-24 03:48:36,070 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 221 [2022-02-24 03:48:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-02-24 03:48:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-02-24 03:48:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-02-24 03:48:36,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:36,072 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:48:36,072 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -784269110, now seen corresponding path program 53 times [2022-02-24 03:48:36,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:36,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763546963] [2022-02-24 03:48:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:36,239 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:36,410 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:36,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:37,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:37,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763546963] [2022-02-24 03:48:37,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [763546963] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:37,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:37,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 03:48:37,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162019372] [2022-02-24 03:48:37,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:37,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 03:48:37,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 03:48:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3597, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:48:37,550 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:42,029 INFO L93 Difference]: Finished difference Result 241 states and 249 transitions. [2022-02-24 03:48:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 03:48:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-02-24 03:48:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:42,030 INFO L225 Difference]: With dead ends: 241 [2022-02-24 03:48:42,030 INFO L226 Difference]: Without dead ends: 232 [2022-02-24 03:48:42,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=470, Invalid=13336, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:48:42,031 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 176 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 12548 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 12609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 12548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:42,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 347 Invalid, 12609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 12548 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:48:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-24 03:48:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-02-24 03:48:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0176211453744493) internal successors, (231), 227 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2022-02-24 03:48:42,046 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 225 [2022-02-24 03:48:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:42,046 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2022-02-24 03:48:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2022-02-24 03:48:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-24 03:48:42,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:42,047 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:48:42,047 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1055895007, now seen corresponding path program 54 times [2022-02-24 03:48:42,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:42,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949562291] [2022-02-24 03:48:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:42,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:42,209 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:42,332 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:43,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:43,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949562291] [2022-02-24 03:48:43,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [949562291] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:43,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:43,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:48:43,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113266557] [2022-02-24 03:48:43,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:43,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:48:43,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:48:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:48:43,382 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:47,876 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2022-02-24 03:48:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:48:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-02-24 03:48:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:47,877 INFO L225 Difference]: With dead ends: 245 [2022-02-24 03:48:47,877 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 03:48:47,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=478, Invalid=13802, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:48:47,879 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 179 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 13000 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 13062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 13000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:47,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 353 Invalid, 13062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 13000 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:48:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 03:48:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-02-24 03:48:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 231 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2022-02-24 03:48:47,888 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 229 [2022-02-24 03:48:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:47,888 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2022-02-24 03:48:47,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2022-02-24 03:48:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-24 03:48:47,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:47,889 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:47,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:48:47,890 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1416028168, now seen corresponding path program 55 times [2022-02-24 03:48:47,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:47,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354238026] [2022-02-24 03:48:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:47,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:48,064 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,198 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:49,453 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:49,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354238026] [2022-02-24 03:48:49,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354238026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:49,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:49,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 03:48:49,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191091628] [2022-02-24 03:48:49,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 03:48:49,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 03:48:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3841, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:48:49,455 INFO L87 Difference]: Start difference. First operand 236 states and 239 transitions. Second operand has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:53,563 INFO L93 Difference]: Finished difference Result 249 states and 257 transitions. [2022-02-24 03:48:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 03:48:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-02-24 03:48:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:53,564 INFO L225 Difference]: With dead ends: 249 [2022-02-24 03:48:53,564 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 03:48:53,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=486, Invalid=14276, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 03:48:53,565 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 182 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 13460 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 13523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 13460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:53,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 359 Invalid, 13523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 13460 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 03:48:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 03:48:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-24 03:48:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-24 03:48:53,571 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 233 [2022-02-24 03:48:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:53,571 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-24 03:48:53,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-24 03:48:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-02-24 03:48:53,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:53,572 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:53,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:48:53,572 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1724459599, now seen corresponding path program 56 times [2022-02-24 03:48:53,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:53,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995130176] [2022-02-24 03:48:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:53,697 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:53,864 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:53,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:55,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:55,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995130176] [2022-02-24 03:48:55,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [995130176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:55,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:55,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 03:48:55,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661025326] [2022-02-24 03:48:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:55,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 03:48:55,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 03:48:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3966, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:48:55,537 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:59,907 INFO L93 Difference]: Finished difference Result 253 states and 261 transitions. [2022-02-24 03:48:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 03:48:59,907 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-02-24 03:48:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:59,908 INFO L225 Difference]: With dead ends: 253 [2022-02-24 03:48:59,908 INFO L226 Difference]: Without dead ends: 244 [2022-02-24 03:48:59,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=494, Invalid=14758, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 03:48:59,910 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 185 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 13695 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 13759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 13695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:59,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 360 Invalid, 13759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 13695 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:48:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-24 03:48:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-02-24 03:48:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 239 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-02-24 03:48:59,919 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 237 [2022-02-24 03:48:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:59,919 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-02-24 03:48:59,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-02-24 03:48:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-02-24 03:48:59,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:59,920 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:59,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:48:59,921 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1683082970, now seen corresponding path program 57 times [2022-02-24 03:48:59,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:59,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175009136] [2022-02-24 03:48:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:00,061 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:00,255 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:00,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:01,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:01,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175009136] [2022-02-24 03:49:01,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [175009136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:01,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:01,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:49:01,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648034981] [2022-02-24 03:49:01,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:01,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:49:01,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:49:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4093, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:49:01,494 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:07,270 INFO L93 Difference]: Finished difference Result 257 states and 265 transitions. [2022-02-24 03:49:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:49:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-02-24 03:49:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:07,271 INFO L225 Difference]: With dead ends: 257 [2022-02-24 03:49:07,271 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 03:49:07,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=502, Invalid=15248, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:49:07,272 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 188 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14404 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 14469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 14404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:07,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 371 Invalid, 14469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 14404 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:49:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 03:49:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-02-24 03:49:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2022-02-24 03:49:07,278 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 241 [2022-02-24 03:49:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:07,278 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2022-02-24 03:49:07,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2022-02-24 03:49:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-02-24 03:49:07,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:07,279 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:07,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:49:07,279 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash 913699965, now seen corresponding path program 58 times [2022-02-24 03:49:07,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:07,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383352897] [2022-02-24 03:49:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:07,391 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:07,535 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:09,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:09,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383352897] [2022-02-24 03:49:09,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383352897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:09,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:09,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 03:49:09,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958101186] [2022-02-24 03:49:09,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:09,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 03:49:09,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 03:49:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4222, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:49:09,445 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:14,492 INFO L93 Difference]: Finished difference Result 261 states and 269 transitions. [2022-02-24 03:49:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 03:49:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-02-24 03:49:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:14,494 INFO L225 Difference]: With dead ends: 261 [2022-02-24 03:49:14,494 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 03:49:14,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=510, Invalid=15746, Unknown=0, NotChecked=0, Total=16256 [2022-02-24 03:49:14,495 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 191 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 14888 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 14954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 14888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:14,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 377 Invalid, 14954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 14888 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-24 03:49:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 03:49:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-02-24 03:49:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 247 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-02-24 03:49:14,501 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 245 [2022-02-24 03:49:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:14,501 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-02-24 03:49:14,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-02-24 03:49:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-24 03:49:14,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:14,502 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:14,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:49:14,503 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash -697420716, now seen corresponding path program 59 times [2022-02-24 03:49:14,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:14,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155247194] [2022-02-24 03:49:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:14,644 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:14,753 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:16,155 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:16,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155247194] [2022-02-24 03:49:16,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155247194] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:16,155 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:16,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 03:49:16,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820687672] [2022-02-24 03:49:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:16,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 03:49:16,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 03:49:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4353, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:49:16,157 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:22,140 INFO L93 Difference]: Finished difference Result 265 states and 273 transitions. [2022-02-24 03:49:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 03:49:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-02-24 03:49:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:22,141 INFO L225 Difference]: With dead ends: 265 [2022-02-24 03:49:22,141 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 03:49:22,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=518, Invalid=16252, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 03:49:22,142 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 194 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 15135 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 15202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 15135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:22,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 378 Invalid, 15202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 15135 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-24 03:49:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 03:49:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-24 03:49:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2022-02-24 03:49:22,148 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 249 [2022-02-24 03:49:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:22,149 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2022-02-24 03:49:22,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2022-02-24 03:49:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-02-24 03:49:22,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:22,150 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:49:22,150 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1040494763, now seen corresponding path program 60 times [2022-02-24 03:49:22,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:22,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138483614] [2022-02-24 03:49:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:22,252 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:22,368 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:23,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:23,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138483614] [2022-02-24 03:49:23,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [138483614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:23,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:23,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 03:49:23,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588799889] [2022-02-24 03:49:23,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:23,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 03:49:23,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 03:49:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4486, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:49:23,768 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:30,470 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2022-02-24 03:49:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 03:49:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-02-24 03:49:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:30,472 INFO L225 Difference]: With dead ends: 269 [2022-02-24 03:49:30,472 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 03:49:30,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=526, Invalid=16766, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 03:49:30,473 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 197 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 15880 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 15948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 15880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:30,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 389 Invalid, 15948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 15880 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-24 03:49:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 03:49:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-02-24 03:49:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-02-24 03:49:30,479 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 253 [2022-02-24 03:49:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:30,479 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-02-24 03:49:30,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-02-24 03:49:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-02-24 03:49:30,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:30,480 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:30,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:49:30,480 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1027135102, now seen corresponding path program 61 times [2022-02-24 03:49:30,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:30,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297320341] [2022-02-24 03:49:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:30,640 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:30,828 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:30,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:32,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:32,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297320341] [2022-02-24 03:49:32,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297320341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:32,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:32,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 03:49:32,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970974990] [2022-02-24 03:49:32,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:32,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 03:49:32,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 03:49:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4621, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:49:32,627 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:38,758 INFO L93 Difference]: Finished difference Result 273 states and 281 transitions. [2022-02-24 03:49:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:49:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-02-24 03:49:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:38,759 INFO L225 Difference]: With dead ends: 273 [2022-02-24 03:49:38,759 INFO L226 Difference]: Without dead ends: 264 [2022-02-24 03:49:38,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=534, Invalid=17288, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 03:49:38,764 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 200 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 16135 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 16204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 16135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:38,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 390 Invalid, 16204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 16135 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:49:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-24 03:49:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-02-24 03:49:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0154440154440154) internal successors, (263), 259 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2022-02-24 03:49:38,783 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 257 [2022-02-24 03:49:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:38,783 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2022-02-24 03:49:38,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2022-02-24 03:49:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-02-24 03:49:38,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:38,785 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:38,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:49:38,785 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1117561127, now seen corresponding path program 62 times [2022-02-24 03:49:38,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:38,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945386057] [2022-02-24 03:49:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:38,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:39,040 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:39,176 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:41,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:41,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945386057] [2022-02-24 03:49:41,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945386057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:41,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:41,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 03:49:41,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477143616] [2022-02-24 03:49:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 03:49:41,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 03:49:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4758, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:49:41,191 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:47,426 INFO L93 Difference]: Finished difference Result 277 states and 285 transitions. [2022-02-24 03:49:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 03:49:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-02-24 03:49:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:47,429 INFO L225 Difference]: With dead ends: 277 [2022-02-24 03:49:47,429 INFO L226 Difference]: Without dead ends: 268 [2022-02-24 03:49:47,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=542, Invalid=17818, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 03:49:47,431 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 203 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 16904 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 16974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 16904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:47,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 401 Invalid, 16974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 16904 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 03:49:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-24 03:49:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-02-24 03:49:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.015209125475285) internal successors, (267), 263 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 271 transitions. [2022-02-24 03:49:47,443 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 271 transitions. Word has length 261 [2022-02-24 03:49:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:47,443 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 271 transitions. [2022-02-24 03:49:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 271 transitions. [2022-02-24 03:49:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-24 03:49:47,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:47,445 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:47,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:49:47,445 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:47,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:47,445 INFO L85 PathProgramCache]: Analyzing trace with hash -106491728, now seen corresponding path program 63 times [2022-02-24 03:49:47,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:47,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253784654] [2022-02-24 03:49:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:47,625 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:47,793 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:47,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:49,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:49,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253784654] [2022-02-24 03:49:49,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253784654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:49,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:49,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:49:49,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293881106] [2022-02-24 03:49:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:49,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:49:49,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:49:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4897, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:49:49,400 INFO L87 Difference]: Start difference. First operand 268 states and 271 transitions. Second operand has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:56,359 INFO L93 Difference]: Finished difference Result 281 states and 289 transitions. [2022-02-24 03:49:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:49:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-02-24 03:49:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:56,362 INFO L225 Difference]: With dead ends: 281 [2022-02-24 03:49:56,362 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 03:49:56,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2726 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=550, Invalid=18356, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:49:56,365 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 206 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 17167 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 17238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 17167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:56,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 402 Invalid, 17238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 17167 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-24 03:49:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 03:49:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-02-24 03:49:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 267 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2022-02-24 03:49:56,375 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 265 [2022-02-24 03:49:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:56,375 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2022-02-24 03:49:56,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2022-02-24 03:49:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-24 03:49:56,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:56,376 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:56,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:49:56,377 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 645922567, now seen corresponding path program 64 times [2022-02-24 03:49:56,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:56,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108725113] [2022-02-24 03:49:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:56,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:56,537 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:56,728 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:59,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:59,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108725113] [2022-02-24 03:49:59,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108725113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:59,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:59,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 03:49:59,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411119757] [2022-02-24 03:49:59,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:59,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 03:49:59,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 03:49:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5038, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:49:59,012 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:06,945 INFO L93 Difference]: Finished difference Result 285 states and 293 transitions. [2022-02-24 03:50:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 03:50:06,945 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-02-24 03:50:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:06,946 INFO L225 Difference]: With dead ends: 285 [2022-02-24 03:50:06,946 INFO L226 Difference]: Without dead ends: 276 [2022-02-24 03:50:06,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=558, Invalid=18902, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 03:50:06,948 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 209 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 17960 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 18032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 17960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:06,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 413 Invalid, 18032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 17960 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-02-24 03:50:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-24 03:50:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-02-24 03:50:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-02-24 03:50:06,958 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 269 [2022-02-24 03:50:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:06,958 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-02-24 03:50:06,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-02-24 03:50:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-02-24 03:50:06,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:06,960 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:06,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:50:06,961 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1174137310, now seen corresponding path program 65 times [2022-02-24 03:50:06,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:06,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735601761] [2022-02-24 03:50:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:06,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:07,181 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:07,385 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:09,309 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:09,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735601761] [2022-02-24 03:50:09,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735601761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:09,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:09,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 03:50:09,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449780846] [2022-02-24 03:50:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:09,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 03:50:09,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 03:50:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5181, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:50:09,311 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:16,324 INFO L93 Difference]: Finished difference Result 289 states and 297 transitions. [2022-02-24 03:50:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 03:50:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-02-24 03:50:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:16,326 INFO L225 Difference]: With dead ends: 289 [2022-02-24 03:50:16,326 INFO L226 Difference]: Without dead ends: 280 [2022-02-24 03:50:16,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=566, Invalid=19456, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 03:50:16,327 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 212 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 18500 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 18573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 18500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:16,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 419 Invalid, 18573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 18500 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-24 03:50:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-24 03:50:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-02-24 03:50:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0145454545454546) internal successors, (279), 275 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-02-24 03:50:16,349 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 273 [2022-02-24 03:50:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:16,359 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-02-24 03:50:16,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-02-24 03:50:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-24 03:50:16,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:16,361 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:16,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:50:16,361 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash 491295029, now seen corresponding path program 66 times [2022-02-24 03:50:16,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:16,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920263941] [2022-02-24 03:50:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:16,600 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:16,816 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:18,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:18,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920263941] [2022-02-24 03:50:18,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920263941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:18,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:18,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 03:50:18,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351326353] [2022-02-24 03:50:18,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:18,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 03:50:18,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 03:50:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5326, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:50:18,872 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:26,366 INFO L93 Difference]: Finished difference Result 293 states and 301 transitions. [2022-02-24 03:50:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 03:50:26,366 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-02-24 03:50:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:26,367 INFO L225 Difference]: With dead ends: 293 [2022-02-24 03:50:26,367 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 03:50:26,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=574, Invalid=20018, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 03:50:26,369 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 19048 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 19122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 19048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:26,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 425 Invalid, 19122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 19048 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-24 03:50:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 03:50:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-02-24 03:50:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.014336917562724) internal successors, (283), 279 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 287 transitions. [2022-02-24 03:50:26,376 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 287 transitions. Word has length 277 [2022-02-24 03:50:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 287 transitions. [2022-02-24 03:50:26,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 287 transitions. [2022-02-24 03:50:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-02-24 03:50:26,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:26,377 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:26,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 03:50:26,377 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1531726580, now seen corresponding path program 67 times [2022-02-24 03:50:26,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:26,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080009375] [2022-02-24 03:50:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:26,496 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:26,666 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:28,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:28,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080009375] [2022-02-24 03:50:28,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080009375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:28,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:28,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 03:50:28,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288672146] [2022-02-24 03:50:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:28,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 03:50:28,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 03:50:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5473, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:50:28,475 INFO L87 Difference]: Start difference. First operand 284 states and 287 transitions. Second operand has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:36,303 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2022-02-24 03:50:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 03:50:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-02-24 03:50:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:36,304 INFO L225 Difference]: With dead ends: 297 [2022-02-24 03:50:36,304 INFO L226 Difference]: Without dead ends: 288 [2022-02-24 03:50:36,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=582, Invalid=20588, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 03:50:36,305 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 218 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 19327 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 19402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 19327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:36,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 426 Invalid, 19402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 19327 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-24 03:50:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-24 03:50:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-02-24 03:50:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.0141342756183747) internal successors, (287), 283 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2022-02-24 03:50:36,312 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 281 [2022-02-24 03:50:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:36,312 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2022-02-24 03:50:36,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2022-02-24 03:50:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-02-24 03:50:36,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:36,313 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:36,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 03:50:36,313 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2007700835, now seen corresponding path program 68 times [2022-02-24 03:50:36,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:36,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922006724] [2022-02-24 03:50:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:36,490 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:36,698 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:36,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:39,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:39,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922006724] [2022-02-24 03:50:39,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922006724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:39,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:39,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 03:50:39,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458086447] [2022-02-24 03:50:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 03:50:39,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 03:50:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5622, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:50:39,117 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:45,824 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2022-02-24 03:50:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 03:50:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-02-24 03:50:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:45,825 INFO L225 Difference]: With dead ends: 301 [2022-02-24 03:50:45,825 INFO L226 Difference]: Without dead ends: 292 [2022-02-24 03:50:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=590, Invalid=21166, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 03:50:45,827 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 221 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 19887 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 19963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 19887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 432 Invalid, 19963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 19887 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-24 03:50:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-24 03:50:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-02-24 03:50:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0139372822299653) internal successors, (291), 287 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2022-02-24 03:50:45,837 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 285 [2022-02-24 03:50:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2022-02-24 03:50:45,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2022-02-24 03:50:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-24 03:50:45,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:45,839 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:45,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 03:50:45,840 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1153200698, now seen corresponding path program 69 times [2022-02-24 03:50:45,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:45,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255580767] [2022-02-24 03:50:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:46,032 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:46,224 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:46,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:48,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:48,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255580767] [2022-02-24 03:50:48,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255580767] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:48,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:48,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:50:48,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454149750] [2022-02-24 03:50:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:48,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:50:48,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:48,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:50:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=5773, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:50:48,598 INFO L87 Difference]: Start difference. First operand 292 states and 295 transitions. Second operand has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:56,185 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2022-02-24 03:50:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:50:56,185 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-02-24 03:50:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:56,186 INFO L225 Difference]: With dead ends: 305 [2022-02-24 03:50:56,186 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 03:50:56,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3191 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=598, Invalid=21752, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:50:56,188 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 224 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 20455 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 20532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 20455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:56,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 438 Invalid, 20532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 20455 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-24 03:50:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 03:50:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-02-24 03:50:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.013745704467354) internal successors, (295), 291 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2022-02-24 03:50:56,209 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 289 [2022-02-24 03:50:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:56,210 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2022-02-24 03:50:56,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2022-02-24 03:50:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-24 03:50:56,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:56,211 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:56,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 03:50:56,211 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1033210769, now seen corresponding path program 70 times [2022-02-24 03:50:56,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:56,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420098871] [2022-02-24 03:50:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:56,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:56,381 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:56,486 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:58,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:58,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420098871] [2022-02-24 03:50:58,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420098871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:58,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:58,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 03:50:58,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915601856] [2022-02-24 03:50:58,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:58,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 03:50:58,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 03:50:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5926, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 03:50:58,302 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:06,440 INFO L93 Difference]: Finished difference Result 309 states and 317 transitions. [2022-02-24 03:51:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 03:51:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-02-24 03:51:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:06,442 INFO L225 Difference]: With dead ends: 309 [2022-02-24 03:51:06,442 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 03:51:06,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3272 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=606, Invalid=22346, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 03:51:06,443 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 227 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 21031 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 21109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 21031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:06,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 444 Invalid, 21109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 21031 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:51:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 03:51:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-02-24 03:51:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-02-24 03:51:06,470 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 293 [2022-02-24 03:51:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:06,470 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-02-24 03:51:06,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-02-24 03:51:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-02-24 03:51:06,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:06,472 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:06,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 03:51:06,472 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2029772440, now seen corresponding path program 71 times [2022-02-24 03:51:06,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:06,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834033190] [2022-02-24 03:51:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:06,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:06,667 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:06,911 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:06,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:09,051 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:09,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834033190] [2022-02-24 03:51:09,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [834033190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:09,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:09,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 03:51:09,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141476950] [2022-02-24 03:51:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:09,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 03:51:09,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 03:51:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6081, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:51:09,053 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:16,461 INFO L93 Difference]: Finished difference Result 313 states and 321 transitions. [2022-02-24 03:51:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 03:51:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-02-24 03:51:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:16,463 INFO L225 Difference]: With dead ends: 313 [2022-02-24 03:51:16,463 INFO L226 Difference]: Without dead ends: 304 [2022-02-24 03:51:16,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3354 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=614, Invalid=22948, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 03:51:16,464 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 230 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 21615 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 21694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 21615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:16,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 450 Invalid, 21694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 21615 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-24 03:51:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-24 03:51:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-02-24 03:51:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0133779264214047) internal successors, (303), 299 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 307 transitions. [2022-02-24 03:51:16,471 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 307 transitions. Word has length 297 [2022-02-24 03:51:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:16,471 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 307 transitions. [2022-02-24 03:51:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 307 transitions. [2022-02-24 03:51:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-02-24 03:51:16,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:16,472 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:16,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 03:51:16,472 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1460276289, now seen corresponding path program 72 times [2022-02-24 03:51:16,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:16,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194425324] [2022-02-24 03:51:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:16,698 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:16,939 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:19,312 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:19,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194425324] [2022-02-24 03:51:19,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [194425324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:19,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:19,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 03:51:19,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859687149] [2022-02-24 03:51:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 03:51:19,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 03:51:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6238, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:51:19,314 INFO L87 Difference]: Start difference. First operand 304 states and 307 transitions. Second operand has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:28,363 INFO L93 Difference]: Finished difference Result 317 states and 325 transitions. [2022-02-24 03:51:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 03:51:28,363 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-02-24 03:51:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:28,364 INFO L225 Difference]: With dead ends: 317 [2022-02-24 03:51:28,364 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 03:51:28,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3437 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=622, Invalid=23558, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 03:51:28,365 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 233 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 22504 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 22584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 22504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:28,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 461 Invalid, 22584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 22504 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-24 03:51:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 03:51:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-02-24 03:51:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.0132013201320131) internal successors, (307), 303 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 311 transitions. [2022-02-24 03:51:28,372 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 311 transitions. Word has length 301 [2022-02-24 03:51:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:28,373 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 311 transitions. [2022-02-24 03:51:28,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 311 transitions. [2022-02-24 03:51:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-02-24 03:51:28,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:28,374 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:28,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 03:51:28,374 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash -25640298, now seen corresponding path program 73 times [2022-02-24 03:51:28,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:28,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183132009] [2022-02-24 03:51:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:28,529 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:28,634 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:28,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:30,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:30,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183132009] [2022-02-24 03:51:30,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183132009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:30,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:30,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 03:51:30,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425289508] [2022-02-24 03:51:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 03:51:30,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 03:51:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6397, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:51:30,276 INFO L87 Difference]: Start difference. First operand 308 states and 311 transitions. Second operand has 79 states, 79 states have (on average 3.810126582278481) internal successors, (301), 78 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:38,607 INFO L93 Difference]: Finished difference Result 321 states and 329 transitions. [2022-02-24 03:51:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 03:51:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.810126582278481) internal successors, (301), 78 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-02-24 03:51:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:38,608 INFO L225 Difference]: With dead ends: 321 [2022-02-24 03:51:38,608 INFO L226 Difference]: Without dead ends: 312 [2022-02-24 03:51:38,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=630, Invalid=24176, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:51:38,610 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 236 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 23108 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 23108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:38,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 467 Invalid, 23189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 23108 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-24 03:51:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-24 03:51:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-02-24 03:51:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.013029315960912) internal successors, (311), 307 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2022-02-24 03:51:38,617 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 305 [2022-02-24 03:51:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:38,617 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2022-02-24 03:51:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.810126582278481) internal successors, (301), 78 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2022-02-24 03:51:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-24 03:51:38,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:38,619 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 03:51:38,619 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 632966637, now seen corresponding path program 74 times [2022-02-24 03:51:38,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:38,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994181517] [2022-02-24 03:51:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:38,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:38,777 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:39,014 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:39,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:41,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:41,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994181517] [2022-02-24 03:51:41,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994181517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:41,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:41,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 03:51:41,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213641122] [2022-02-24 03:51:41,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:41,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 03:51:41,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 03:51:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6558, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:51:41,719 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:51,498 INFO L93 Difference]: Finished difference Result 325 states and 333 transitions. [2022-02-24 03:51:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 03:51:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-02-24 03:51:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:51,500 INFO L225 Difference]: With dead ends: 325 [2022-02-24 03:51:51,500 INFO L226 Difference]: Without dead ends: 316 [2022-02-24 03:51:51,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=638, Invalid=24802, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 03:51:51,501 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 239 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 23415 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 23497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 23415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:51,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 468 Invalid, 23497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 23415 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-02-24 03:51:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-24 03:51:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-02-24 03:51:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.0128617363344052) internal successors, (315), 311 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 319 transitions. [2022-02-24 03:51:51,512 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 319 transitions. Word has length 309 [2022-02-24 03:51:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:51,512 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 319 transitions. [2022-02-24 03:51:51,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 319 transitions. [2022-02-24 03:51:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-02-24 03:51:51,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:51,514 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:51,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 03:51:51,514 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1879594436, now seen corresponding path program 75 times [2022-02-24 03:51:51,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:51,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705178078] [2022-02-24 03:51:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:51,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:51,716 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:51,890 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:53,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:53,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705178078] [2022-02-24 03:51:53,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705178078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:53,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:53,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:51:53,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883995982] [2022-02-24 03:51:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:53,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:51:53,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:51:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6721, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:51:53,964 INFO L87 Difference]: Start difference. First operand 316 states and 319 transitions. Second operand has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:03,706 INFO L93 Difference]: Finished difference Result 329 states and 337 transitions. [2022-02-24 03:52:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:52:03,707 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-02-24 03:52:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:03,708 INFO L225 Difference]: With dead ends: 329 [2022-02-24 03:52:03,708 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 03:52:03,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=646, Invalid=25436, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:52:03,709 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 242 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 24340 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 24423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 24340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:03,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 479 Invalid, 24423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 24340 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-02-24 03:52:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 03:52:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-02-24 03:52:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 315 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2022-02-24 03:52:03,723 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 313 [2022-02-24 03:52:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:03,723 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2022-02-24 03:52:03,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2022-02-24 03:52:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-02-24 03:52:03,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:03,724 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:03,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 03:52:03,725 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1372625435, now seen corresponding path program 76 times [2022-02-24 03:52:03,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:03,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585898392] [2022-02-24 03:52:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:03,897 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:04,003 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:04,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:06,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:06,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585898392] [2022-02-24 03:52:06,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585898392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:06,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:06,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 03:52:06,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312277856] [2022-02-24 03:52:06,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:06,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 03:52:06,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 03:52:06,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=6886, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 03:52:06,079 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:15,522 INFO L93 Difference]: Finished difference Result 333 states and 341 transitions. [2022-02-24 03:52:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 03:52:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2022-02-24 03:52:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:15,523 INFO L225 Difference]: With dead ends: 333 [2022-02-24 03:52:15,524 INFO L226 Difference]: Without dead ends: 324 [2022-02-24 03:52:15,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=654, Invalid=26078, Unknown=0, NotChecked=0, Total=26732 [2022-02-24 03:52:15,525 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 245 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 24968 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 25052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 24968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 485 Invalid, 25052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 24968 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-24 03:52:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-24 03:52:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2022-02-24 03:52:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.0125391849529781) internal successors, (323), 319 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 327 transitions. [2022-02-24 03:52:15,546 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 327 transitions. Word has length 317 [2022-02-24 03:52:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:15,546 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 327 transitions. [2022-02-24 03:52:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 327 transitions. [2022-02-24 03:52:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-02-24 03:52:15,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:15,548 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:15,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 03:52:15,559 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash -761210126, now seen corresponding path program 77 times [2022-02-24 03:52:15,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:15,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491710784] [2022-02-24 03:52:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:15,740 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:15,883 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:15,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:18,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:18,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491710784] [2022-02-24 03:52:18,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491710784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:18,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:18,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 03:52:18,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150722778] [2022-02-24 03:52:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:18,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 03:52:18,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 03:52:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7053, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:52:18,719 INFO L87 Difference]: Start difference. First operand 324 states and 327 transitions. Second operand has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:30,323 INFO L93 Difference]: Finished difference Result 337 states and 345 transitions. [2022-02-24 03:52:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 03:52:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-02-24 03:52:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:30,324 INFO L225 Difference]: With dead ends: 337 [2022-02-24 03:52:30,324 INFO L226 Difference]: Without dead ends: 328 [2022-02-24 03:52:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=662, Invalid=26728, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 03:52:30,325 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 248 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 25287 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 25372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 25287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 486 Invalid, 25372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 25287 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-02-24 03:52:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-24 03:52:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-02-24 03:52:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.0123839009287925) internal successors, (327), 323 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2022-02-24 03:52:30,333 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 321 [2022-02-24 03:52:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2022-02-24 03:52:30,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2022-02-24 03:52:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-02-24 03:52:30,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:30,334 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:30,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 03:52:30,335 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash -47785911, now seen corresponding path program 78 times [2022-02-24 03:52:30,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:30,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968096100] [2022-02-24 03:52:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:30,466 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:30,655 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:30,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:33,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:33,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968096100] [2022-02-24 03:52:33,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [968096100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:33,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:33,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 03:52:33,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974168297] [2022-02-24 03:52:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:33,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 03:52:33,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 03:52:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7222, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:52:33,626 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:42,508 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2022-02-24 03:52:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 03:52:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2022-02-24 03:52:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:42,509 INFO L225 Difference]: With dead ends: 341 [2022-02-24 03:52:42,509 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 03:52:42,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3956 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=670, Invalid=27386, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 03:52:42,511 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 251 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 25927 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 26013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 25927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 492 Invalid, 26013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 25927 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-24 03:52:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 03:52:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-02-24 03:52:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.0122324159021407) internal successors, (331), 327 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 335 transitions. [2022-02-24 03:52:42,518 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 335 transitions. Word has length 325 [2022-02-24 03:52:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:42,518 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 335 transitions. [2022-02-24 03:52:42,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 335 transitions. [2022-02-24 03:52:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-02-24 03:52:42,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:42,520 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:42,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 03:52:42,520 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1328566816, now seen corresponding path program 79 times [2022-02-24 03:52:42,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:42,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895727956] [2022-02-24 03:52:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:42,724 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:42,907 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:45,019 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:45,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895727956] [2022-02-24 03:52:45,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895727956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:45,019 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:45,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 03:52:45,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705303583] [2022-02-24 03:52:45,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:45,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 03:52:45,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 03:52:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7393, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:52:45,020 INFO L87 Difference]: Start difference. First operand 332 states and 335 transitions. Second operand has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:56,684 INFO L93 Difference]: Finished difference Result 345 states and 353 transitions. [2022-02-24 03:52:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 03:52:56,685 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-02-24 03:52:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:56,686 INFO L225 Difference]: With dead ends: 345 [2022-02-24 03:52:56,686 INFO L226 Difference]: Without dead ends: 336 [2022-02-24 03:52:56,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=678, Invalid=28052, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 03:52:56,687 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 254 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 26575 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 26662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 26575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:56,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 498 Invalid, 26662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 26575 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-02-24 03:52:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-24 03:52:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-02-24 03:52:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.012084592145015) internal successors, (335), 331 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 339 transitions. [2022-02-24 03:52:56,704 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 339 transitions. Word has length 329 [2022-02-24 03:52:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:56,704 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 339 transitions. [2022-02-24 03:52:56,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 339 transitions. [2022-02-24 03:52:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-02-24 03:52:56,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:56,706 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:56,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 03:52:56,707 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 699074679, now seen corresponding path program 80 times [2022-02-24 03:52:56,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:56,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449833145] [2022-02-24 03:52:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:56,873 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:57,124 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:59,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:59,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449833145] [2022-02-24 03:52:59,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449833145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:59,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:59,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 03:52:59,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167660551] [2022-02-24 03:52:59,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:59,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 03:52:59,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 03:52:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7566, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 03:52:59,636 INFO L87 Difference]: Start difference. First operand 336 states and 339 transitions. Second operand has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:10,075 INFO L93 Difference]: Finished difference Result 349 states and 357 transitions. [2022-02-24 03:53:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 03:53:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 333 [2022-02-24 03:53:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:10,077 INFO L225 Difference]: With dead ends: 349 [2022-02-24 03:53:10,077 INFO L226 Difference]: Without dead ends: 340 [2022-02-24 03:53:10,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4137 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=686, Invalid=28726, Unknown=0, NotChecked=0, Total=29412 [2022-02-24 03:53:10,079 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 257 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 27560 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 27648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 27560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 509 Invalid, 27648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 27560 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-24 03:53:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-24 03:53:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-02-24 03:53:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.0119402985074626) internal successors, (339), 335 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 343 transitions. [2022-02-24 03:53:10,091 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 343 transitions. Word has length 333 [2022-02-24 03:53:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 343 transitions. [2022-02-24 03:53:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 343 transitions. [2022-02-24 03:53:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-02-24 03:53:10,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:10,093 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:10,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 03:53:10,093 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1084537678, now seen corresponding path program 81 times [2022-02-24 03:53:10,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:10,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495517130] [2022-02-24 03:53:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:10,277 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:10,463 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:12,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:12,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495517130] [2022-02-24 03:53:12,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [495517130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:12,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:12,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:53:12,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374935412] [2022-02-24 03:53:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:12,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:53:12,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:53:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7741, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:53:12,935 INFO L87 Difference]: Start difference. First operand 340 states and 343 transitions. Second operand has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:23,322 INFO L93 Difference]: Finished difference Result 353 states and 361 transitions. [2022-02-24 03:53:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:53:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 337 [2022-02-24 03:53:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:23,323 INFO L225 Difference]: With dead ends: 353 [2022-02-24 03:53:23,324 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 03:53:23,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=694, Invalid=29408, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:53:23,325 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 260 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 28228 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 28317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 28228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:23,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 515 Invalid, 28317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 28228 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-24 03:53:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 03:53:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-02-24 03:53:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.0117994100294985) internal successors, (343), 339 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 347 transitions. [2022-02-24 03:53:23,336 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 347 transitions. Word has length 337 [2022-02-24 03:53:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:23,336 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 347 transitions. [2022-02-24 03:53:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 347 transitions. [2022-02-24 03:53:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-02-24 03:53:23,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:23,338 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:23,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 03:53:23,338 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash 189475493, now seen corresponding path program 82 times [2022-02-24 03:53:23,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:23,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812121343] [2022-02-24 03:53:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:23,489 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:23,604 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:26,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:26,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812121343] [2022-02-24 03:53:26,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812121343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:26,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:26,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-24 03:53:26,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287493091] [2022-02-24 03:53:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:26,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-24 03:53:26,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-24 03:53:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=7918, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 03:53:26,258 INFO L87 Difference]: Start difference. First operand 344 states and 347 transitions. Second operand has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:36,419 INFO L93 Difference]: Finished difference Result 357 states and 365 transitions. [2022-02-24 03:53:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-24 03:53:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-02-24 03:53:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:36,420 INFO L225 Difference]: With dead ends: 357 [2022-02-24 03:53:36,420 INFO L226 Difference]: Without dead ends: 348 [2022-02-24 03:53:36,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=702, Invalid=30098, Unknown=0, NotChecked=0, Total=30800 [2022-02-24 03:53:36,421 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 263 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 28567 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 28657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 28567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:36,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 516 Invalid, 28657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 28567 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-24 03:53:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-24 03:53:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-02-24 03:53:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.0116618075801749) internal successors, (347), 343 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 351 transitions. [2022-02-24 03:53:36,429 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 351 transitions. Word has length 341 [2022-02-24 03:53:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:36,430 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 351 transitions. [2022-02-24 03:53:36,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 351 transitions. [2022-02-24 03:53:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-02-24 03:53:36,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:36,431 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 03:53:36,431 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 871110268, now seen corresponding path program 83 times [2022-02-24 03:53:36,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:36,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579633856] [2022-02-24 03:53:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:36,542 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:36,713 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:36,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:39,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:39,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579633856] [2022-02-24 03:53:39,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579633856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:39,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:39,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 03:53:39,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867375318] [2022-02-24 03:53:39,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:39,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 03:53:39,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 03:53:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8097, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:53:39,706 INFO L87 Difference]: Start difference. First operand 348 states and 351 transitions. Second operand has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:50,919 INFO L93 Difference]: Finished difference Result 361 states and 369 transitions. [2022-02-24 03:53:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 03:53:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-02-24 03:53:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:50,921 INFO L225 Difference]: With dead ends: 361 [2022-02-24 03:53:50,921 INFO L226 Difference]: Without dead ends: 352 [2022-02-24 03:53:50,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4416 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=710, Invalid=30796, Unknown=0, NotChecked=0, Total=31506 [2022-02-24 03:53:50,923 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 266 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 29588 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 29679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 29588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:50,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 527 Invalid, 29679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 29588 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-02-24 03:53:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-24 03:53:50,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-02-24 03:53:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.0115273775216138) internal successors, (351), 347 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 355 transitions. [2022-02-24 03:53:50,935 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 355 transitions. Word has length 345 [2022-02-24 03:53:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:50,935 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 355 transitions. [2022-02-24 03:53:50,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 355 transitions. [2022-02-24 03:53:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-02-24 03:53:50,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:50,937 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:50,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 03:53:50,937 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash 133512915, now seen corresponding path program 84 times [2022-02-24 03:53:50,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:50,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618258533] [2022-02-24 03:53:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:50,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:51,109 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:51,239 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:51,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:53,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:53,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618258533] [2022-02-24 03:53:53,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [618258533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:53,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:53,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 03:53:53,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534228737] [2022-02-24 03:53:53,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:53,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 03:53:53,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 03:53:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8278, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:53:53,748 INFO L87 Difference]: Start difference. First operand 352 states and 355 transitions. Second operand has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:05,089 INFO L93 Difference]: Finished difference Result 365 states and 373 transitions. [2022-02-24 03:54:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 03:54:05,090 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 349 [2022-02-24 03:54:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:05,091 INFO L225 Difference]: With dead ends: 365 [2022-02-24 03:54:05,091 INFO L226 Difference]: Without dead ends: 356 [2022-02-24 03:54:05,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4511 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=718, Invalid=31502, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:54:05,092 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 269 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 29935 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 30027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 29935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:05,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 528 Invalid, 30027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 29935 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-02-24 03:54:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-24 03:54:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2022-02-24 03:54:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.0113960113960114) internal successors, (355), 351 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 359 transitions. [2022-02-24 03:54:05,102 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 359 transitions. Word has length 349 [2022-02-24 03:54:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:05,102 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 359 transitions. [2022-02-24 03:54:05,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 359 transitions. [2022-02-24 03:54:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-02-24 03:54:05,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:05,104 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:05,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 03:54:05,104 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash -403414102, now seen corresponding path program 85 times [2022-02-24 03:54:05,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:05,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131063180] [2022-02-24 03:54:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:05,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:05,271 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:05,395 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:08,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:08,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131063180] [2022-02-24 03:54:08,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131063180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:08,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:08,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 03:54:08,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363811477] [2022-02-24 03:54:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:08,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 03:54:08,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 03:54:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8461, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:54:08,254 INFO L87 Difference]: Start difference. First operand 356 states and 359 transitions. Second operand has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:22,035 INFO L93 Difference]: Finished difference Result 369 states and 377 transitions. [2022-02-24 03:54:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 03:54:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-02-24 03:54:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:22,037 INFO L225 Difference]: With dead ends: 369 [2022-02-24 03:54:22,037 INFO L226 Difference]: Without dead ends: 360 [2022-02-24 03:54:22,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4607 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=726, Invalid=32216, Unknown=0, NotChecked=0, Total=32942 [2022-02-24 03:54:22,039 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 272 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 30980 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 31073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 30980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:22,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 539 Invalid, 31073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 30980 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-02-24 03:54:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-24 03:54:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-02-24 03:54:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.0112676056338028) internal successors, (359), 355 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2022-02-24 03:54:22,050 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 353 [2022-02-24 03:54:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:22,051 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2022-02-24 03:54:22,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2022-02-24 03:54:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-02-24 03:54:22,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:22,054 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:22,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 03:54:22,054 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1214823167, now seen corresponding path program 86 times [2022-02-24 03:54:22,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:22,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190949028] [2022-02-24 03:54:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:22,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:22,244 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,391 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:25,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:25,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190949028] [2022-02-24 03:54:25,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190949028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:25,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:25,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 03:54:25,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900922898] [2022-02-24 03:54:25,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:25,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 03:54:25,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 03:54:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=8646, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:54:25,596 INFO L87 Difference]: Start difference. First operand 360 states and 363 transitions. Second operand has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:39,262 INFO L93 Difference]: Finished difference Result 373 states and 381 transitions. [2022-02-24 03:54:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 03:54:39,262 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 357 [2022-02-24 03:54:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:39,263 INFO L225 Difference]: With dead ends: 373 [2022-02-24 03:54:39,263 INFO L226 Difference]: Without dead ends: 364 [2022-02-24 03:54:39,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=734, Invalid=32938, Unknown=0, NotChecked=0, Total=33672 [2022-02-24 03:54:39,265 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 275 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 31335 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 31429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 31335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:39,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 540 Invalid, 31429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 31335 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-02-24 03:54:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-24 03:54:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-02-24 03:54:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.011142061281337) internal successors, (363), 359 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 367 transitions. [2022-02-24 03:54:39,287 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 367 transitions. Word has length 357 [2022-02-24 03:54:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:39,287 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 367 transitions. [2022-02-24 03:54:39,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 367 transitions. [2022-02-24 03:54:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-02-24 03:54:39,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:39,289 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:39,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 03:54:39,289 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:39,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1303093976, now seen corresponding path program 87 times [2022-02-24 03:54:39,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:39,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155317818] [2022-02-24 03:54:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:39,500 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:39,689 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:39,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:42,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:42,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155317818] [2022-02-24 03:54:42,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [155317818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:42,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:42,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 03:54:42,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443098357] [2022-02-24 03:54:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 03:54:42,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 03:54:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=8833, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:54:42,374 INFO L87 Difference]: Start difference. First operand 364 states and 367 transitions. Second operand has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:53,951 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2022-02-24 03:54:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 03:54:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-02-24 03:54:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:53,952 INFO L225 Difference]: With dead ends: 377 [2022-02-24 03:54:53,952 INFO L226 Difference]: Without dead ends: 368 [2022-02-24 03:54:53,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4802 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=742, Invalid=33668, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 03:54:53,953 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 278 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 32404 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 32499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 32404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:53,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 551 Invalid, 32499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 32404 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-02-24 03:54:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-24 03:54:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-02-24 03:54:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.0110192837465564) internal successors, (367), 363 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 371 transitions. [2022-02-24 03:54:53,962 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 371 transitions. Word has length 361 [2022-02-24 03:54:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:53,962 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 371 transitions. [2022-02-24 03:54:53,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 371 transitions. [2022-02-24 03:54:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-02-24 03:54:53,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:53,963 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:53,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 03:54:53,964 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash -467714769, now seen corresponding path program 88 times [2022-02-24 03:54:53,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:53,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665177358] [2022-02-24 03:54:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:54,145 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:54,348 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:54,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:57,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:57,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665177358] [2022-02-24 03:54:57,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1665177358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:57,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:57,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 03:54:57,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927582845] [2022-02-24 03:54:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:57,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 03:54:57,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 03:54:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9022, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:54:57,397 INFO L87 Difference]: Start difference. First operand 368 states and 371 transitions. Second operand has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:09,606 INFO L93 Difference]: Finished difference Result 381 states and 389 transitions. [2022-02-24 03:55:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 03:55:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-02-24 03:55:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:09,607 INFO L225 Difference]: With dead ends: 381 [2022-02-24 03:55:09,607 INFO L226 Difference]: Without dead ends: 372 [2022-02-24 03:55:09,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4901 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=750, Invalid=34406, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:55:09,609 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 281 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 33128 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 33224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 33128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:09,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 557 Invalid, 33224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 33128 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-02-24 03:55:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-24 03:55:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-02-24 03:55:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.0108991825613078) internal successors, (371), 367 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 375 transitions. [2022-02-24 03:55:09,616 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 375 transitions. Word has length 365 [2022-02-24 03:55:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:09,617 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 375 transitions. [2022-02-24 03:55:09,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 375 transitions. [2022-02-24 03:55:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-02-24 03:55:09,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:09,618 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:09,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 03:55:09,618 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:09,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2013277178, now seen corresponding path program 89 times [2022-02-24 03:55:09,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:09,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23106087] [2022-02-24 03:55:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:09,813 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:10,039 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:12,483 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:12,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23106087] [2022-02-24 03:55:12,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [23106087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:12,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:12,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 03:55:12,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92440338] [2022-02-24 03:55:12,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:12,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 03:55:12,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 03:55:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9213, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:55:12,485 INFO L87 Difference]: Start difference. First operand 372 states and 375 transitions. Second operand has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:25,211 INFO L93 Difference]: Finished difference Result 385 states and 393 transitions. [2022-02-24 03:55:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 03:55:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-02-24 03:55:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:25,213 INFO L225 Difference]: With dead ends: 385 [2022-02-24 03:55:25,213 INFO L226 Difference]: Without dead ends: 376 [2022-02-24 03:55:25,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5001 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=758, Invalid=35152, Unknown=0, NotChecked=0, Total=35910 [2022-02-24 03:55:25,215 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 284 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 33495 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 33592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 33495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:25,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 558 Invalid, 33592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 33495 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-02-24 03:55:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-24 03:55:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-02-24 03:55:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0107816711590296) internal successors, (375), 371 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 379 transitions. [2022-02-24 03:55:25,227 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 379 transitions. Word has length 369 [2022-02-24 03:55:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:25,227 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 379 transitions. [2022-02-24 03:55:25,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 379 transitions. [2022-02-24 03:55:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-02-24 03:55:25,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:25,229 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:25,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 03:55:25,229 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1988417699, now seen corresponding path program 90 times [2022-02-24 03:55:25,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:25,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356837445] [2022-02-24 03:55:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:25,439 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:25,653 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:29,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:29,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356837445] [2022-02-24 03:55:29,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356837445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:29,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:29,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:55:29,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437859301] [2022-02-24 03:55:29,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:55:29,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:55:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9406, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:55:29,069 INFO L87 Difference]: Start difference. First operand 376 states and 379 transitions. Second operand has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:42,687 INFO L93 Difference]: Finished difference Result 389 states and 397 transitions. [2022-02-24 03:55:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:55:42,687 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 373 [2022-02-24 03:55:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:42,689 INFO L225 Difference]: With dead ends: 389 [2022-02-24 03:55:42,689 INFO L226 Difference]: Without dead ends: 380 [2022-02-24 03:55:42,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=766, Invalid=35906, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:55:42,691 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 287 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 34231 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 34329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 34231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:42,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 564 Invalid, 34329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 34231 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-02-24 03:55:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-24 03:55:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-02-24 03:55:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.0106666666666666) internal successors, (379), 375 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 383 transitions. [2022-02-24 03:55:42,702 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 383 transitions. Word has length 373 [2022-02-24 03:55:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:42,703 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 383 transitions. [2022-02-24 03:55:42,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 383 transitions. [2022-02-24 03:55:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-02-24 03:55:42,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:42,705 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:42,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 03:55:42,705 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash -337709260, now seen corresponding path program 91 times [2022-02-24 03:55:42,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:42,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196982249] [2022-02-24 03:55:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:42,904 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:43,092 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:43,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:46,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:46,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196982249] [2022-02-24 03:55:46,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [196982249] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:46,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:46,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 03:55:46,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483612456] [2022-02-24 03:55:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:46,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 03:55:46,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 03:55:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=9601, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:55:46,303 INFO L87 Difference]: Start difference. First operand 380 states and 383 transitions. Second operand has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:58,557 INFO L93 Difference]: Finished difference Result 393 states and 401 transitions. [2022-02-24 03:55:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 03:55:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-02-24 03:55:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:58,561 INFO L225 Difference]: With dead ends: 393 [2022-02-24 03:55:58,561 INFO L226 Difference]: Without dead ends: 384 [2022-02-24 03:55:58,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5204 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=774, Invalid=36668, Unknown=0, NotChecked=0, Total=37442 [2022-02-24 03:55:58,563 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 290 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 35348 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 35447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 35348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:58,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 575 Invalid, 35447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 35348 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-24 03:55:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-24 03:55:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-02-24 03:55:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.0105540897097625) internal successors, (383), 379 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 387 transitions. [2022-02-24 03:55:58,576 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 387 transitions. Word has length 377 [2022-02-24 03:55:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:58,576 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 387 transitions. [2022-02-24 03:55:58,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 387 transitions. [2022-02-24 03:55:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-02-24 03:55:58,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:58,579 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:58,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 03:55:58,579 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash -711392373, now seen corresponding path program 92 times [2022-02-24 03:55:58,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:58,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307514546] [2022-02-24 03:55:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:58,817 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:59,057 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:59,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:02,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:02,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307514546] [2022-02-24 03:56:02,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307514546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:02,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:02,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 03:56:02,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781064844] [2022-02-24 03:56:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:02,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 03:56:02,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 03:56:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=9798, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 03:56:02,831 INFO L87 Difference]: Start difference. First operand 384 states and 387 transitions. Second operand has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:16,312 INFO L93 Difference]: Finished difference Result 397 states and 405 transitions. [2022-02-24 03:56:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 03:56:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-02-24 03:56:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:16,314 INFO L225 Difference]: With dead ends: 397 [2022-02-24 03:56:16,314 INFO L226 Difference]: Without dead ends: 388 [2022-02-24 03:56:16,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5307 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=782, Invalid=37438, Unknown=0, NotChecked=0, Total=38220 [2022-02-24 03:56:16,316 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 293 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 36104 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 36204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 36104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:16,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 581 Invalid, 36204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 36104 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-02-24 03:56:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-24 03:56:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-02-24 03:56:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.010443864229765) internal successors, (387), 383 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 391 transitions. [2022-02-24 03:56:16,329 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 391 transitions. Word has length 381 [2022-02-24 03:56:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:16,330 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 391 transitions. [2022-02-24 03:56:16,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 391 transitions. [2022-02-24 03:56:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-02-24 03:56:16,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:16,332 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:16,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 03:56:16,332 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash 3607650, now seen corresponding path program 93 times [2022-02-24 03:56:16,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:16,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811408162] [2022-02-24 03:56:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:16,452 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:16,611 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:20,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:20,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811408162] [2022-02-24 03:56:20,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811408162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:20,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:20,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 03:56:20,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634139050] [2022-02-24 03:56:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:20,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 03:56:20,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 03:56:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=9997, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:56:20,798 INFO L87 Difference]: Start difference. First operand 388 states and 391 transitions. Second operand has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:34,826 INFO L93 Difference]: Finished difference Result 401 states and 409 transitions. [2022-02-24 03:56:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 03:56:34,827 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2022-02-24 03:56:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:34,828 INFO L225 Difference]: With dead ends: 401 [2022-02-24 03:56:34,828 INFO L226 Difference]: Without dead ends: 392 [2022-02-24 03:56:34,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5411 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=790, Invalid=38216, Unknown=0, NotChecked=0, Total=39006 [2022-02-24 03:56:34,830 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 296 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 36487 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 36588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 36487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:34,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 582 Invalid, 36588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 36487 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-02-24 03:56:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-24 03:56:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-02-24 03:56:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0103359173126616) internal successors, (391), 387 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 395 transitions. [2022-02-24 03:56:34,838 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 395 transitions. Word has length 385 [2022-02-24 03:56:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 395 transitions. [2022-02-24 03:56:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 395 transitions. [2022-02-24 03:56:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-02-24 03:56:34,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:34,840 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:34,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 03:56:34,840 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash 677827001, now seen corresponding path program 94 times [2022-02-24 03:56:34,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:34,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773925566] [2022-02-24 03:56:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:35,046 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:35,241 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:38,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:38,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773925566] [2022-02-24 03:56:38,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773925566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:38,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:38,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-24 03:56:38,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93479502] [2022-02-24 03:56:38,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:38,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-24 03:56:38,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-24 03:56:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10198, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 03:56:38,734 INFO L87 Difference]: Start difference. First operand 392 states and 395 transitions. Second operand has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:53,438 INFO L93 Difference]: Finished difference Result 405 states and 413 transitions. [2022-02-24 03:56:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-24 03:56:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 389 [2022-02-24 03:56:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:53,440 INFO L225 Difference]: With dead ends: 405 [2022-02-24 03:56:53,440 INFO L226 Difference]: Without dead ends: 396 [2022-02-24 03:56:53,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5516 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=798, Invalid=39002, Unknown=0, NotChecked=0, Total=39800 [2022-02-24 03:56:53,443 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 299 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 37255 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 37357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 37255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:53,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 588 Invalid, 37357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 37255 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-02-24 03:56:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-24 03:56:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2022-02-24 03:56:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.010230179028133) internal successors, (395), 391 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 399 transitions. [2022-02-24 03:56:53,457 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 399 transitions. Word has length 389 [2022-02-24 03:56:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 399 transitions. [2022-02-24 03:56:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 399 transitions. [2022-02-24 03:56:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-02-24 03:56:53,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:53,460 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:53,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 03:56:53,460 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2113278864, now seen corresponding path program 95 times [2022-02-24 03:56:53,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:53,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632030530] [2022-02-24 03:56:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:53,633 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:53,751 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:57,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:57,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632030530] [2022-02-24 03:56:57,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [632030530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:57,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:57,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 03:56:57,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493735742] [2022-02-24 03:56:57,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:57,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 03:56:57,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 03:56:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=10401, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:56:57,585 INFO L87 Difference]: Start difference. First operand 396 states and 399 transitions. Second operand has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:13,470 INFO L93 Difference]: Finished difference Result 409 states and 417 transitions. [2022-02-24 03:57:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 03:57:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 393 [2022-02-24 03:57:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:13,472 INFO L225 Difference]: With dead ends: 409 [2022-02-24 03:57:13,472 INFO L226 Difference]: Without dead ends: 400 [2022-02-24 03:57:13,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5622 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=806, Invalid=39796, Unknown=0, NotChecked=0, Total=40602 [2022-02-24 03:57:13,473 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 302 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 38420 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 38523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 38420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 599 Invalid, 38523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 38420 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-02-24 03:57:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-02-24 03:57:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-02-24 03:57:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.010126582278481) internal successors, (399), 395 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 403 transitions. [2022-02-24 03:57:13,482 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 403 transitions. Word has length 393 [2022-02-24 03:57:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:13,482 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 403 transitions. [2022-02-24 03:57:13,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 403 transitions. [2022-02-24 03:57:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-02-24 03:57:13,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:13,484 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:13,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 03:57:13,484 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash 332567015, now seen corresponding path program 96 times [2022-02-24 03:57:13,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:13,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343943479] [2022-02-24 03:57:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:13,643 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:13,811 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:13,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:16,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:16,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343943479] [2022-02-24 03:57:16,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [343943479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:16,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:16,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 03:57:16,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627600753] [2022-02-24 03:57:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 03:57:16,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 03:57:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=10606, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:57:16,791 INFO L87 Difference]: Start difference. First operand 400 states and 403 transitions. Second operand has 102 states, 102 states have (on average 3.8529411764705883) internal successors, (393), 101 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:29,776 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2022-02-24 03:57:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:57:29,776 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.8529411764705883) internal successors, (393), 101 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-02-24 03:57:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:29,778 INFO L225 Difference]: With dead ends: 413 [2022-02-24 03:57:29,778 INFO L226 Difference]: Without dead ends: 404 [2022-02-24 03:57:29,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5729 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=814, Invalid=40598, Unknown=0, NotChecked=0, Total=41412 [2022-02-24 03:57:29,780 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 305 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 38815 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 38919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 38815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:29,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 600 Invalid, 38919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 38815 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-02-24 03:57:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-24 03:57:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-02-24 03:57:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.0100250626566416) internal successors, (403), 399 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2022-02-24 03:57:29,794 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 397 [2022-02-24 03:57:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:29,794 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2022-02-24 03:57:29,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.8529411764705883) internal successors, (393), 101 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2022-02-24 03:57:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-02-24 03:57:29,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:29,796 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 03:57:29,796 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1342835902, now seen corresponding path program 97 times [2022-02-24 03:57:29,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:29,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450172467] [2022-02-24 03:57:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:30,004 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:30,256 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:34,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:34,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450172467] [2022-02-24 03:57:34,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450172467] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:34,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:34,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 03:57:34,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233808207] [2022-02-24 03:57:34,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:34,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 03:57:34,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:34,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 03:57:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=10813, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:57:34,237 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:47,404 INFO L93 Difference]: Finished difference Result 417 states and 425 transitions. [2022-02-24 03:57:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 03:57:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-02-24 03:57:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:47,405 INFO L225 Difference]: With dead ends: 417 [2022-02-24 03:57:47,405 INFO L226 Difference]: Without dead ends: 408 [2022-02-24 03:57:47,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5837 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=822, Invalid=41408, Unknown=0, NotChecked=0, Total=42230 [2022-02-24 03:57:47,407 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 308 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 40004 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 40109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 40004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:47,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 611 Invalid, 40109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 40004 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-02-24 03:57:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-24 03:57:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-02-24 03:57:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 411 transitions. [2022-02-24 03:57:47,416 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 411 transitions. Word has length 401 [2022-02-24 03:57:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:47,416 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 411 transitions. [2022-02-24 03:57:47,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 411 transitions. [2022-02-24 03:57:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-02-24 03:57:47,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:47,418 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:47,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 03:57:47,418 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1539982357, now seen corresponding path program 98 times [2022-02-24 03:57:47,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:47,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837530836] [2022-02-24 03:57:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:47,640 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:47,818 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:51,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:51,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837530836] [2022-02-24 03:57:51,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [837530836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:51,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:51,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 03:57:51,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666017097] [2022-02-24 03:57:51,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:51,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 03:57:51,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 03:57:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=11022, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 03:57:51,892 INFO L87 Difference]: Start difference. First operand 408 states and 411 transitions. Second operand has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:06,663 INFO L93 Difference]: Finished difference Result 421 states and 429 transitions. [2022-02-24 03:58:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 03:58:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-02-24 03:58:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:06,669 INFO L225 Difference]: With dead ends: 421 [2022-02-24 03:58:06,670 INFO L226 Difference]: Without dead ends: 412 [2022-02-24 03:58:06,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=830, Invalid=42226, Unknown=0, NotChecked=0, Total=43056 [2022-02-24 03:58:06,672 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 311 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 40808 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 40914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 40808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 617 Invalid, 40914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 40808 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-02-24 03:58:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-02-24 03:58:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2022-02-24 03:58:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.00982800982801) internal successors, (411), 407 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 415 transitions. [2022-02-24 03:58:06,686 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 415 transitions. Word has length 405 [2022-02-24 03:58:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:06,686 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 415 transitions. [2022-02-24 03:58:06,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 415 transitions. [2022-02-24 03:58:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-02-24 03:58:06,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:06,689 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:06,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 03:58:06,689 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1822361620, now seen corresponding path program 99 times [2022-02-24 03:58:06,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:06,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72944262] [2022-02-24 03:58:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:06,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:06,913 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:07,187 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:58:10,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:10,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72944262] [2022-02-24 03:58:10,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [72944262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:10,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:10,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 03:58:10,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281106912] [2022-02-24 03:58:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:10,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 03:58:10,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 03:58:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=11233, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:58:10,510 INFO L87 Difference]: Start difference. First operand 412 states and 415 transitions. Second operand has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:27,214 INFO L93 Difference]: Finished difference Result 425 states and 433 transitions. [2022-02-24 03:58:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 03:58:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 409 [2022-02-24 03:58:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:27,216 INFO L225 Difference]: With dead ends: 425 [2022-02-24 03:58:27,216 INFO L226 Difference]: Without dead ends: 416 [2022-02-24 03:58:27,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6056 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=838, Invalid=43052, Unknown=0, NotChecked=0, Total=43890 [2022-02-24 03:58:27,219 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 314 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 41215 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 41322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 41215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:27,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 618 Invalid, 41322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 41215 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-02-24 03:58:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-24 03:58:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-02-24 03:58:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.0097323600973236) internal successors, (415), 411 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 419 transitions. [2022-02-24 03:58:27,233 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 419 transitions. Word has length 409 [2022-02-24 03:58:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 419 transitions. [2022-02-24 03:58:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 419 transitions. [2022-02-24 03:58:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-02-24 03:58:27,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:27,236 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:27,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 03:58:27,236 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -163846077, now seen corresponding path program 100 times [2022-02-24 03:58:27,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:27,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406772489] [2022-02-24 03:58:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:27,443 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:27,683 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:27,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:58:32,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:32,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406772489] [2022-02-24 03:58:32,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406772489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:32,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:32,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-24 03:58:32,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448466585] [2022-02-24 03:58:32,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-24 03:58:32,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-24 03:58:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=11446, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 03:58:32,018 INFO L87 Difference]: Start difference. First operand 416 states and 419 transitions. Second operand has 106 states, 106 states have (on average 3.858490566037736) internal successors, (409), 105 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:47,794 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2022-02-24 03:58:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-24 03:58:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.858490566037736) internal successors, (409), 105 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 413 [2022-02-24 03:58:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:47,795 INFO L225 Difference]: With dead ends: 429 [2022-02-24 03:58:47,795 INFO L226 Difference]: Without dead ends: 420 [2022-02-24 03:58:47,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6167 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=846, Invalid=43886, Unknown=0, NotChecked=0, Total=44732 [2022-02-24 03:58:47,798 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 317 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 42440 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 42548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 42440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:47,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 629 Invalid, 42548 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [108 Valid, 42440 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-02-24 03:58:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-24 03:58:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-02-24 03:58:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.0096385542168675) internal successors, (419), 415 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 423 transitions. [2022-02-24 03:58:47,810 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 423 transitions. Word has length 413 [2022-02-24 03:58:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:47,811 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 423 transitions. [2022-02-24 03:58:47,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.858490566037736) internal successors, (409), 105 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 423 transitions. [2022-02-24 03:58:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-02-24 03:58:47,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:47,813 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:47,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 03:58:47,813 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:47,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1763125990, now seen corresponding path program 101 times [2022-02-24 03:58:47,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:47,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275968029] [2022-02-24 03:58:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:48,109 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:48,356 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:48,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:58:52,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:52,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275968029] [2022-02-24 03:58:52,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275968029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:52,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:52,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 03:58:52,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988848999] [2022-02-24 03:58:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:52,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 03:58:52,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:52,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 03:58:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=11661, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:58:52,955 INFO L87 Difference]: Start difference. First operand 420 states and 423 transitions. Second operand has 107 states, 107 states have (on average 3.8598130841121496) internal successors, (413), 106 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:59:09,295 INFO L93 Difference]: Finished difference Result 433 states and 441 transitions. [2022-02-24 03:59:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 03:59:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.8598130841121496) internal successors, (413), 106 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 417 [2022-02-24 03:59:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:59:09,300 INFO L225 Difference]: With dead ends: 433 [2022-02-24 03:59:09,301 INFO L226 Difference]: Without dead ends: 424 [2022-02-24 03:59:09,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6279 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=854, Invalid=44728, Unknown=0, NotChecked=0, Total=45582 [2022-02-24 03:59:09,302 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 320 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 42855 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 42964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 42855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:59:09,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 630 Invalid, 42964 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 42855 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-02-24 03:59:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-24 03:59:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-02-24 03:59:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 419 states have (on average 1.009546539379475) internal successors, (423), 419 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 427 transitions. [2022-02-24 03:59:09,311 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 427 transitions. Word has length 417 [2022-02-24 03:59:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:59:09,312 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 427 transitions. [2022-02-24 03:59:09,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.8598130841121496) internal successors, (413), 106 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 427 transitions. [2022-02-24 03:59:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-02-24 03:59:09,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:59:09,313 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:59:09,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 03:59:09,314 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:59:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:59:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 185958001, now seen corresponding path program 102 times [2022-02-24 03:59:09,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:59:09,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127610396] [2022-02-24 03:59:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:59:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:59:09,489 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:09,698 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:59:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:59:13,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:59:13,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127610396] [2022-02-24 03:59:13,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [127610396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:59:13,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:59:13,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 03:59:13,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491455052] [2022-02-24 03:59:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:59:13,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 03:59:13,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:59:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 03:59:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=11878, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:59:13,983 INFO L87 Difference]: Start difference. First operand 424 states and 427 transitions. Second operand has 108 states, 108 states have (on average 3.861111111111111) internal successors, (417), 107 states have internal predecessors, (417), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:59:30,834 INFO L93 Difference]: Finished difference Result 437 states and 445 transitions. [2022-02-24 03:59:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 03:59:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.861111111111111) internal successors, (417), 107 states have internal predecessors, (417), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 421 [2022-02-24 03:59:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:59:30,836 INFO L225 Difference]: With dead ends: 437 [2022-02-24 03:59:30,836 INFO L226 Difference]: Without dead ends: 428 [2022-02-24 03:59:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6392 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=862, Invalid=45578, Unknown=0, NotChecked=0, Total=46440 [2022-02-24 03:59:30,838 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 323 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 43687 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 43797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 43687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:59:30,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 636 Invalid, 43797 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [110 Valid, 43687 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-02-24 03:59:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-24 03:59:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-02-24 03:59:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.0094562647754137) internal successors, (427), 423 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 431 transitions. [2022-02-24 03:59:30,851 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 431 transitions. Word has length 421 [2022-02-24 03:59:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:59:30,851 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 431 transitions. [2022-02-24 03:59:30,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.861111111111111) internal successors, (417), 107 states have internal predecessors, (417), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 431 transitions. [2022-02-24 03:59:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-02-24 03:59:30,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:59:30,853 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:59:30,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 03:59:30,854 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:59:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:59:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -611343288, now seen corresponding path program 103 times [2022-02-24 03:59:30,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:59:30,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118707114] [2022-02-24 03:59:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:59:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:59:31,133 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:31,395 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:31,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:59:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:59:36,184 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:59:36,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118707114] [2022-02-24 03:59:36,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118707114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:59:36,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:59:36,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 03:59:36,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669001909] [2022-02-24 03:59:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:59:36,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 03:59:36,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:59:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 03:59:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=12097, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:59:36,187 INFO L87 Difference]: Start difference. First operand 428 states and 431 transitions. Second operand has 109 states, 109 states have (on average 3.8623853211009176) internal successors, (421), 108 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:59:52,888 INFO L93 Difference]: Finished difference Result 441 states and 449 transitions. [2022-02-24 03:59:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 03:59:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.8623853211009176) internal successors, (421), 108 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-02-24 03:59:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:59:52,889 INFO L225 Difference]: With dead ends: 441 [2022-02-24 03:59:52,889 INFO L226 Difference]: Without dead ends: 432 [2022-02-24 03:59:52,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6506 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=870, Invalid=46436, Unknown=0, NotChecked=0, Total=47306 [2022-02-24 03:59:52,891 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 326 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 44527 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 44638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 44527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:59:52,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 642 Invalid, 44638 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [111 Valid, 44527 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-02-24 03:59:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-24 03:59:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-02-24 03:59:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.009367681498829) internal successors, (431), 427 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 435 transitions. [2022-02-24 03:59:52,900 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 435 transitions. Word has length 425 [2022-02-24 03:59:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:59:52,901 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 435 transitions. [2022-02-24 03:59:52,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.8623853211009176) internal successors, (421), 108 states have internal predecessors, (421), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:59:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 435 transitions. [2022-02-24 03:59:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-02-24 03:59:52,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:59:52,902 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:59:52,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 03:59:52,902 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:59:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:59:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash -196802913, now seen corresponding path program 104 times [2022-02-24 03:59:52,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:59:52,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46816328] [2022-02-24 03:59:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:59:52,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:59:53,075 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:53,222 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:59:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:59:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:59:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:59:56,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:59:56,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46816328] [2022-02-24 03:59:56,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46816328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:59:56,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:59:56,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 03:59:56,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555607680] [2022-02-24 03:59:56,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:59:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 03:59:56,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:59:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 03:59:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=12318, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 03:59:56,738 INFO L87 Difference]: Start difference. First operand 432 states and 435 transitions. Second operand has 110 states, 110 states have (on average 3.8636363636363638) internal successors, (425), 109 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:00:14,481 INFO L93 Difference]: Finished difference Result 445 states and 453 transitions. [2022-02-24 04:00:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 04:00:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.8636363636363638) internal successors, (425), 109 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 429 [2022-02-24 04:00:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:00:14,483 INFO L225 Difference]: With dead ends: 445 [2022-02-24 04:00:14,483 INFO L226 Difference]: Without dead ends: 436 [2022-02-24 04:00:14,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6621 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=878, Invalid=47302, Unknown=0, NotChecked=0, Total=48180 [2022-02-24 04:00:14,485 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 329 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 45375 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 45487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 45375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:00:14,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 648 Invalid, 45487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [112 Valid, 45375 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-02-24 04:00:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-24 04:00:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-02-24 04:00:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.0092807424593968) internal successors, (435), 431 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 439 transitions. [2022-02-24 04:00:14,495 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 439 transitions. Word has length 429 [2022-02-24 04:00:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:00:14,495 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 439 transitions. [2022-02-24 04:00:14,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.8636363636363638) internal successors, (425), 109 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 439 transitions. [2022-02-24 04:00:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-02-24 04:00:14,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:00:14,497 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:00:14,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 04:00:14,498 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:00:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:00:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 339961206, now seen corresponding path program 105 times [2022-02-24 04:00:14,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:00:14,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007594952] [2022-02-24 04:00:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:00:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:00:14,698 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 04:00:14,958 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 04:00:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:00:14,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:00:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:00:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:00:19,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:00:19,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007594952] [2022-02-24 04:00:19,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007594952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:00:19,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:00:19,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 04:00:19,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521400671] [2022-02-24 04:00:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:00:19,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 04:00:19,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:00:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 04:00:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=12541, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 04:00:19,176 INFO L87 Difference]: Start difference. First operand 436 states and 439 transitions. Second operand has 111 states, 111 states have (on average 3.864864864864865) internal successors, (429), 110 states have internal predecessors, (429), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:00:37,839 INFO L93 Difference]: Finished difference Result 449 states and 457 transitions. [2022-02-24 04:00:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 04:00:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.864864864864865) internal successors, (429), 110 states have internal predecessors, (429), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 433 [2022-02-24 04:00:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:00:37,841 INFO L225 Difference]: With dead ends: 449 [2022-02-24 04:00:37,841 INFO L226 Difference]: Without dead ends: 440 [2022-02-24 04:00:37,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=886, Invalid=48176, Unknown=0, NotChecked=0, Total=49062 [2022-02-24 04:00:37,843 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 332 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 46231 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 46344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 46231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:00:37,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 654 Invalid, 46344 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 46231 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-02-24 04:00:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-24 04:00:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-02-24 04:00:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.0091954022988505) internal successors, (439), 435 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 443 transitions. [2022-02-24 04:00:37,856 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 443 transitions. Word has length 433 [2022-02-24 04:00:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:00:37,856 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 443 transitions. [2022-02-24 04:00:37,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.864864864864865) internal successors, (429), 110 states have internal predecessors, (429), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:00:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 443 transitions. [2022-02-24 04:00:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-02-24 04:00:37,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:00:37,858 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:00:37,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 04:00:37,859 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:00:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:00:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1035501773, now seen corresponding path program 106 times [2022-02-24 04:00:37,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:00:37,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259124249] [2022-02-24 04:00:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:00:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:00:38,086 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 04:00:38,250 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 04:00:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:00:38,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:00:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:00:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:00:41,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:00:41,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259124249] [2022-02-24 04:00:41,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [259124249] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:00:41,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:00:41,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 04:00:41,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705316258] [2022-02-24 04:00:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:00:41,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 04:00:41,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:00:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 04:00:41,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=12766, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 04:00:41,877 INFO L87 Difference]: Start difference. First operand 440 states and 443 transitions. Second operand has 112 states, 112 states have (on average 3.8660714285714284) internal successors, (433), 111 states have internal predecessors, (433), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)