/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:28:15,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:28:15,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:28:15,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:28:15,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:28:15,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:28:15,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:28:15,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:28:15,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:28:15,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:28:15,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:28:15,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:28:15,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:28:15,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:28:15,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:28:15,880 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:28:15,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:28:16,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:28:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:28:16,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:28:16,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:28:16,077 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:28:16,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-02-24 01:28:16,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaed0e83/1d776335014f427897f835d3e6b0524e/FLAG6c7c01bc6 [2022-02-24 01:28:16,481 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:28:16,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-02-24 01:28:16,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaed0e83/1d776335014f427897f835d3e6b0524e/FLAG6c7c01bc6 [2022-02-24 01:28:16,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaed0e83/1d776335014f427897f835d3e6b0524e [2022-02-24 01:28:16,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:28:16,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:28:16,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:28:16,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:28:16,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:28:16,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a0229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16, skipping insertion in model container [2022-02-24 01:28:16,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:28:16,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:28:16,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-02-24 01:28:16,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:28:16,681 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:28:16,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-02-24 01:28:16,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:28:16,698 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:28:16,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16 WrapperNode [2022-02-24 01:28:16,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:28:16,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:28:16,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:28:16,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:28:16,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:28:16,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:28:16,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:28:16,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:28:16,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (1/1) ... [2022-02-24 01:28:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:28:16,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:28:16,756 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 01:28:16,770 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 01:28:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:28:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:28:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:28:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 01:28:16,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:28:16,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:28:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:28:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:28:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:28:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:28:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:28:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:28:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 01:28:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:28:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:28:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:28:16,857 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:28:16,861 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:28:16,944 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:28:16,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:28:16,948 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 01:28:16,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:28:16 BoogieIcfgContainer [2022-02-24 01:28:16,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:28:16,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:28:16,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:28:16,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:28:16,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:28:16" (1/3) ... [2022-02-24 01:28:16,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f46979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:28:16, skipping insertion in model container [2022-02-24 01:28:16,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:28:16" (2/3) ... [2022-02-24 01:28:16,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f46979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:28:16, skipping insertion in model container [2022-02-24 01:28:16,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:28:16" (3/3) ... [2022-02-24 01:28:16,955 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-02-24 01:28:16,959 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:28:16,959 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:28:16,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:28:16,992 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:28:16,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:28:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 01:28:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 01:28:17,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:17,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:17,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 1 times [2022-02-24 01:28:17,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:17,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081664975] [2022-02-24 01:28:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:17,079 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,201 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 01:28:17,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:17,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081664975] [2022-02-24 01:28:17,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081664975] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:17,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:17,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:28:17,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534383079] [2022-02-24 01:28:17,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:28:17,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:28:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:28:17,256 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:17,306 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-02-24 01:28:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:28:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 01:28:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:17,319 INFO L225 Difference]: With dead ends: 43 [2022-02-24 01:28:17,320 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 01:28:17,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:28:17,327 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:17,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:28:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 01:28:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 01:28:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 01:28:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-24 01:28:17,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-02-24 01:28:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:17,350 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-24 01:28:17,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-24 01:28:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 01:28:17,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:17,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:17,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:28:17,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 1 times [2022-02-24 01:28:17,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:17,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975437537] [2022-02-24 01:28:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:17,354 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,471 INFO 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 01:28:17,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:17,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975437537] [2022-02-24 01:28:17,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975437537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:17,472 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:17,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:28:17,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635085627] [2022-02-24 01:28:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:17,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:28:17,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:28:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:28:17,473 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 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 01:28:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:17,560 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-02-24 01:28:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:28:17,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 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 01:28:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:17,561 INFO L225 Difference]: With dead ends: 29 [2022-02-24 01:28:17,561 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 01:28:17,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:28:17,563 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:17,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 01:28:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-02-24 01:28:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-24 01:28:17,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-02-24 01:28:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-24 01:28:17,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 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 01:28:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-24 01:28:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 01:28:17,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:17,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:17,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:28:17,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 1 times [2022-02-24 01:28:17,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:17,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977773978] [2022-02-24 01:28:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:17,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:17,572 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:17,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:17,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977773978] [2022-02-24 01:28:17,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977773978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:17,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:17,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:28:17,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488499371] [2022-02-24 01:28:17,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:28:17,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:28:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:28:17,664 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:17,764 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-24 01:28:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:28:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 01:28:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:17,767 INFO L225 Difference]: With dead ends: 38 [2022-02-24 01:28:17,767 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 01:28:17,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:28:17,768 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:17,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 01:28:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-02-24 01:28:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 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 01:28:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-02-24 01:28:17,776 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2022-02-24 01:28:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:17,776 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-02-24 01:28:17,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-02-24 01:28:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 01:28:17,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:17,777 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:17,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:28:17,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 2 times [2022-02-24 01:28:17,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:17,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439527418] [2022-02-24 01:28:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:17,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:17,780 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:17,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:17,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439527418] [2022-02-24 01:28:17,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439527418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:17,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:17,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:28:17,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407341788] [2022-02-24 01:28:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:28:17,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:28:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:28:17,869 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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 01:28:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:17,996 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-02-24 01:28:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:28:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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 01:28:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:18,000 INFO L225 Difference]: With dead ends: 43 [2022-02-24 01:28:18,000 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 01:28:18,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:28:18,002 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:18,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 01:28:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-02-24 01:28:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-24 01:28:18,012 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-02-24 01:28:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:18,012 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-24 01:28:18,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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 01:28:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-24 01:28:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:28:18,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:18,013 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:18,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:28:18,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 3 times [2022-02-24 01:28:18,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:18,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484130825] [2022-02-24 01:28:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:18,016 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,102 INFO 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 01:28:18,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:18,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484130825] [2022-02-24 01:28:18,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [484130825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:18,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:18,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:28:18,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462529868] [2022-02-24 01:28:18,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:28:18,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:28:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:28:18,106 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:18,233 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-02-24 01:28:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:28:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 01:28:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:18,234 INFO L225 Difference]: With dead ends: 48 [2022-02-24 01:28:18,235 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 01:28:18,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:28:18,236 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:18,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 01:28:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-02-24 01:28:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 01:28:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-02-24 01:28:18,242 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2022-02-24 01:28:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:18,243 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-02-24 01:28:18,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-02-24 01:28:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:28:18,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:18,244 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:18,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:28:18,244 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 4 times [2022-02-24 01:28:18,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:18,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505728621] [2022-02-24 01:28:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:18,246 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,308 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 01:28:18,309 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:18,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505728621] [2022-02-24 01:28:18,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [505728621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:18,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:18,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:28:18,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082617800] [2022-02-24 01:28:18,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:18,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:28:18,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:28:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:28:18,310 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) 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 01:28:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:18,438 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-02-24 01:28:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:28:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) 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 01:28:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:18,441 INFO L225 Difference]: With dead ends: 53 [2022-02-24 01:28:18,441 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 01:28:18,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:28:18,445 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:18,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 35 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 01:28:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-02-24 01:28:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-02-24 01:28:18,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-02-24 01:28:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:18,464 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-02-24 01:28:18,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) 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 01:28:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-02-24 01:28:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:28:18,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:18,465 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:18,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:28:18,465 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 5 times [2022-02-24 01:28:18,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:18,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826962566] [2022-02-24 01:28:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:18,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:18,468 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:18,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:18,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826962566] [2022-02-24 01:28:18,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [826962566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:18,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:18,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:28:18,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244343897] [2022-02-24 01:28:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:18,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:28:18,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:28:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:28:18,572 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:18,713 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-02-24 01:28:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:28:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 01:28:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:18,714 INFO L225 Difference]: With dead ends: 58 [2022-02-24 01:28:18,714 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 01:28:18,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:28:18,715 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:18,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 35 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 01:28:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-02-24 01:28:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 40 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 01:28:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-02-24 01:28:18,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2022-02-24 01:28:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:18,722 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-02-24 01:28:18,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-02-24 01:28:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:28:18,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:18,723 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:18,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:28:18,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 6 times [2022-02-24 01:28:18,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:18,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448301824] [2022-02-24 01:28:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:18,725 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:18,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:18,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448301824] [2022-02-24 01:28:18,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448301824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:18,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:18,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:28:18,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420543035] [2022-02-24 01:28:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:28:18,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:28:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:28:18,809 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 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 01:28:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:18,966 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-02-24 01:28:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:28:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 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 01:28:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:18,968 INFO L225 Difference]: With dead ends: 63 [2022-02-24 01:28:18,968 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 01:28:18,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:28:18,968 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 40 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 01:28:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-24 01:28:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-02-24 01:28:18,977 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 29 [2022-02-24 01:28:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:18,977 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-02-24 01:28:18,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 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 01:28:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-24 01:28:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:28:18,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:18,978 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:18,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:28:18,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 7 times [2022-02-24 01:28:18,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:18,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917471976] [2022-02-24 01:28:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:18,980 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,071 INFO 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 01:28:19,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:19,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917471976] [2022-02-24 01:28:19,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917471976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:19,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:19,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:28:19,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725800530] [2022-02-24 01:28:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:28:19,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:28:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:28:19,072 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:19,230 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-02-24 01:28:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:28:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 01:28:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:19,231 INFO L225 Difference]: With dead ends: 68 [2022-02-24 01:28:19,231 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 01:28:19,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:28:19,232 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:19,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 35 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 01:28:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-02-24 01:28:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.18) internal successors, (59), 50 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 01:28:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-02-24 01:28:19,253 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 31 [2022-02-24 01:28:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:19,253 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-02-24 01:28:19,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-02-24 01:28:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:28:19,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:19,254 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:19,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:28:19,254 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 8 times [2022-02-24 01:28:19,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:19,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65263937] [2022-02-24 01:28:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:19,256 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:19,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:19,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65263937] [2022-02-24 01:28:19,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [65263937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:19,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:19,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:28:19,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477245869] [2022-02-24 01:28:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:19,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:28:19,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:28:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:28:19,348 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 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 01:28:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:19,514 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-02-24 01:28:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:28:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 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 01:28:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:19,515 INFO L225 Difference]: With dead ends: 73 [2022-02-24 01:28:19,515 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 01:28:19,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:28:19,515 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:19,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 40 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 01:28:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-02-24 01:28:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-02-24 01:28:19,525 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2022-02-24 01:28:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:19,525 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-02-24 01:28:19,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 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 01:28:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-02-24 01:28:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 01:28:19,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:19,526 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:19,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:28:19,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 9 times [2022-02-24 01:28:19,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:19,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966455238] [2022-02-24 01:28:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:19,528 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,638 INFO 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 01:28:19,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:19,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966455238] [2022-02-24 01:28:19,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966455238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:19,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:19,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:28:19,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684649568] [2022-02-24 01:28:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:19,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:28:19,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:28:19,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:28:19,639 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:19,834 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-02-24 01:28:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:28:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 01:28:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:19,835 INFO L225 Difference]: With dead ends: 78 [2022-02-24 01:28:19,835 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 01:28:19,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:28:19,836 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:19,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 45 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 01:28:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-02-24 01:28:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 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 01:28:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-02-24 01:28:19,846 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 35 [2022-02-24 01:28:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:19,846 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-02-24 01:28:19,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-02-24 01:28:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:28:19,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:19,847 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:28:19,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 10 times [2022-02-24 01:28:19,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:19,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130798857] [2022-02-24 01:28:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:19,849 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:19,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:19,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130798857] [2022-02-24 01:28:19,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [130798857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:19,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:19,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:28:19,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391249374] [2022-02-24 01:28:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:28:19,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:28:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:28:19,958 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 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 01:28:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:20,160 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-02-24 01:28:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:28:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 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 01:28:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:20,161 INFO L225 Difference]: With dead ends: 83 [2022-02-24 01:28:20,161 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 01:28:20,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:28:20,162 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:20,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 30 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 01:28:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-02-24 01:28:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-02-24 01:28:20,172 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 37 [2022-02-24 01:28:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:20,172 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-02-24 01:28:20,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 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 01:28:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-02-24 01:28:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:28:20,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:20,173 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:20,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:28:20,173 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 11 times [2022-02-24 01:28:20,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:20,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154431355] [2022-02-24 01:28:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:20,174 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:20,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:20,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154431355] [2022-02-24 01:28:20,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154431355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:20,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:20,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:28:20,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629677037] [2022-02-24 01:28:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:28:20,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:28:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:28:20,290 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:20,534 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-02-24 01:28:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:28:20,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 01:28:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:20,535 INFO L225 Difference]: With dead ends: 88 [2022-02-24 01:28:20,535 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:28:20,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:28:20,536 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 197 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:20,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 35 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:28:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2022-02-24 01:28:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 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 01:28:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-02-24 01:28:20,545 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 39 [2022-02-24 01:28:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:20,546 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-02-24 01:28:20,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-02-24 01:28:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:28:20,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:20,546 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:20,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:28:20,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 12 times [2022-02-24 01:28:20,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:20,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124107719] [2022-02-24 01:28:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:20,548 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:20,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:20,665 INFO 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 01:28:20,665 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:20,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124107719] [2022-02-24 01:28:20,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124107719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:20,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:20,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:28:20,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892128218] [2022-02-24 01:28:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:28:20,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:28:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:28:20,666 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 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 01:28:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:20,904 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-02-24 01:28:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:28:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 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 01:28:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:20,905 INFO L225 Difference]: With dead ends: 93 [2022-02-24 01:28:20,905 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 01:28:20,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:28:20,906 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:20,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 01:28:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-02-24 01:28:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-02-24 01:28:20,916 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 41 [2022-02-24 01:28:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:20,917 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-02-24 01:28:20,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 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 01:28:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-02-24 01:28:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 01:28:20,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:20,917 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:20,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:28:20,917 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 13 times [2022-02-24 01:28:20,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:20,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919869522] [2022-02-24 01:28:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:20,922 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:21,069 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:21,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919869522] [2022-02-24 01:28:21,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [919869522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:21,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:21,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:28:21,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392392809] [2022-02-24 01:28:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:21,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:28:21,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:28:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:28:21,070 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:21,336 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-02-24 01:28:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:28:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 01:28:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:21,337 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:28:21,337 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:28:21,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:28:21,338 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:21,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 45 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:28:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-02-24 01:28:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1875) internal successors, (95), 80 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 01:28:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-02-24 01:28:21,355 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 43 [2022-02-24 01:28:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:21,355 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-02-24 01:28:21,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-02-24 01:28:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:28:21,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:21,356 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:21,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:28:21,356 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 14 times [2022-02-24 01:28:21,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:21,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709317333] [2022-02-24 01:28:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:21,358 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,501 INFO 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 01:28:21,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:21,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709317333] [2022-02-24 01:28:21,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [709317333] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:21,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:21,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:28:21,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089726376] [2022-02-24 01:28:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:21,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:28:21,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:28:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:28:21,502 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 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 01:28:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:21,782 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2022-02-24 01:28:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:28:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 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 01:28:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:21,784 INFO L225 Difference]: With dead ends: 103 [2022-02-24 01:28:21,784 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 01:28:21,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:28:21,785 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:21,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 01:28:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-02-24 01:28:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-02-24 01:28:21,798 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2022-02-24 01:28:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:21,798 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-02-24 01:28:21,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 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 01:28:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-02-24 01:28:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:28:21,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:21,800 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:21,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:28:21,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 15 times [2022-02-24 01:28:21,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:21,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984036374] [2022-02-24 01:28:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:21,803 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:21,973 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:21,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984036374] [2022-02-24 01:28:21,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984036374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:21,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:21,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:28:21,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83859982] [2022-02-24 01:28:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:21,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:28:21,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:28:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:28:21,974 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:22,272 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-02-24 01:28:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:28:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 01:28:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:22,272 INFO L225 Difference]: With dead ends: 108 [2022-02-24 01:28:22,272 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 01:28:22,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:28:22,273 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:22,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 55 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 01:28:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-02-24 01:28:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 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 01:28:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-02-24 01:28:22,292 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 47 [2022-02-24 01:28:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:22,293 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-02-24 01:28:22,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-02-24 01:28:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 01:28:22,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:22,293 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:22,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:28:22,293 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 16 times [2022-02-24 01:28:22,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:22,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934791296] [2022-02-24 01:28:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:22,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:22,296 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:22,472 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 01:28:22,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:22,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934791296] [2022-02-24 01:28:22,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [934791296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:22,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:22,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:28:22,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312036275] [2022-02-24 01:28:22,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:22,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:28:22,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:28:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:28:22,474 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 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 01:28:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:22,785 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-02-24 01:28:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:28:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 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 01:28:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:22,785 INFO L225 Difference]: With dead ends: 113 [2022-02-24 01:28:22,786 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 01:28:22,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:28:22,787 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 241 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:22,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 40 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 01:28:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-02-24 01:28:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-02-24 01:28:22,800 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 49 [2022-02-24 01:28:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:22,800 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-02-24 01:28:22,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 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 01:28:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-02-24 01:28:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:28:22,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:22,800 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:28:22,801 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 17 times [2022-02-24 01:28:22,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:22,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198439995] [2022-02-24 01:28:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:22,803 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:22,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:22,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:22,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198439995] [2022-02-24 01:28:22,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198439995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:22,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:22,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:28:22,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990397794] [2022-02-24 01:28:22,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:22,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:28:22,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:28:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:28:22,993 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:23,344 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-02-24 01:28:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:28:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:28:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:23,344 INFO L225 Difference]: With dead ends: 118 [2022-02-24 01:28:23,344 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 01:28:23,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:28:23,345 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 227 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:23,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 45 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 01:28:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-02-24 01:28:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.19) internal successors, (119), 100 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 01:28:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-02-24 01:28:23,360 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 51 [2022-02-24 01:28:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:23,360 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-02-24 01:28:23,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-02-24 01:28:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:28:23,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:23,360 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:23,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:28:23,360 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 18 times [2022-02-24 01:28:23,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:23,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823258792] [2022-02-24 01:28:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:23,362 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:23,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:23,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:23,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823258792] [2022-02-24 01:28:23,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823258792] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:23,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:23,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:28:23,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330752427] [2022-02-24 01:28:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:23,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:28:23,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:28:23,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:28:23,546 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 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 01:28:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:23,944 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2022-02-24 01:28:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:28:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 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 01:28:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:23,945 INFO L225 Difference]: With dead ends: 123 [2022-02-24 01:28:23,945 INFO L226 Difference]: Without dead ends: 117 [2022-02-24 01:28:23,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:28:23,947 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 243 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:23,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 35 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-24 01:28:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-02-24 01:28:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 105 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2022-02-24 01:28:23,967 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 53 [2022-02-24 01:28:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:23,967 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2022-02-24 01:28:23,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 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 01:28:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2022-02-24 01:28:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:28:23,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:23,968 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:23,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:28:23,968 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 19 times [2022-02-24 01:28:23,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:23,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436867755] [2022-02-24 01:28:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:23,971 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:24,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:24,232 INFO 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 01:28:24,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:24,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436867755] [2022-02-24 01:28:24,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436867755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:24,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:24,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:28:24,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800513775] [2022-02-24 01:28:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:24,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:28:24,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:28:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:28:24,234 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:24,673 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-02-24 01:28:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:28:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 01:28:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:24,675 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:28:24,675 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:28:24,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:28:24,677 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 50 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:28:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2022-02-24 01:28:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 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 01:28:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-02-24 01:28:24,696 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 55 [2022-02-24 01:28:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:24,696 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-02-24 01:28:24,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-02-24 01:28:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:28:24,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:24,697 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:28:24,698 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 20 times [2022-02-24 01:28:24,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:24,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998871116] [2022-02-24 01:28:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:24,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:24,699 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:24,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:24,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998871116] [2022-02-24 01:28:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998871116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:24,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:24,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:28:24,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809097079] [2022-02-24 01:28:24,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:24,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:28:24,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:28:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:28:24,944 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 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 01:28:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:25,252 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-02-24 01:28:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:28:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 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 01:28:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:25,254 INFO L225 Difference]: With dead ends: 133 [2022-02-24 01:28:25,254 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 01:28:25,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:28:25,256 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:25,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 40 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 01:28:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-02-24 01:28:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-02-24 01:28:25,281 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 57 [2022-02-24 01:28:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:25,281 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-02-24 01:28:25,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 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 01:28:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-02-24 01:28:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:28:25,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:25,285 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:25,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:28:25,286 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 21 times [2022-02-24 01:28:25,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:25,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545931244] [2022-02-24 01:28:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:25,287 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:25,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:25,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545931244] [2022-02-24 01:28:25,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [545931244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:25,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:25,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:28:25,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055062787] [2022-02-24 01:28:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:25,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:28:25,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:28:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:28:25,504 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:25,840 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2022-02-24 01:28:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:28:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:28:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:25,841 INFO L225 Difference]: With dead ends: 138 [2022-02-24 01:28:25,841 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 01:28:25,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:28:25,842 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:25,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 45 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 01:28:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-02-24 01:28:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 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 01:28:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-02-24 01:28:25,867 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 59 [2022-02-24 01:28:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-02-24 01:28:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-02-24 01:28:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:28:25,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:25,868 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:25,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:28:25,868 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 22 times [2022-02-24 01:28:25,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:25,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056825210] [2022-02-24 01:28:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:25,869 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:26,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:26,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056825210] [2022-02-24 01:28:26,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056825210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:26,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:26,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:28:26,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280469703] [2022-02-24 01:28:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:28:26,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:28:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:28:26,143 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 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 01:28:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:26,579 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-02-24 01:28:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:28:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 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 01:28:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:26,580 INFO L225 Difference]: With dead ends: 143 [2022-02-24 01:28:26,580 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 01:28:26,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:28:26,581 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:26,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 45 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 01:28:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-02-24 01:28:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 125 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2022-02-24 01:28:26,602 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 61 [2022-02-24 01:28:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2022-02-24 01:28:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 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 01:28:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2022-02-24 01:28:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:28:26,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:26,603 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:26,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:28:26,603 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 23 times [2022-02-24 01:28:26,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:26,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506680923] [2022-02-24 01:28:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:26,607 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:26,870 INFO 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 01:28:26,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:26,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506680923] [2022-02-24 01:28:26,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506680923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:26,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:26,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:28:26,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516541740] [2022-02-24 01:28:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:26,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:28:26,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:28:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:28:26,871 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:27,364 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-02-24 01:28:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:28:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 01:28:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:27,365 INFO L225 Difference]: With dead ends: 148 [2022-02-24 01:28:27,365 INFO L226 Difference]: Without dead ends: 142 [2022-02-24 01:28:27,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:28:27,366 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 305 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:27,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 45 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-24 01:28:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2022-02-24 01:28:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 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 01:28:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-02-24 01:28:27,389 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 63 [2022-02-24 01:28:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:27,390 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-02-24 01:28:27,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-02-24 01:28:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:28:27,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:27,390 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:27,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:28:27,390 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 24 times [2022-02-24 01:28:27,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:27,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716450043] [2022-02-24 01:28:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:27,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:27,393 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:27,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:27,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:27,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716450043] [2022-02-24 01:28:27,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716450043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:27,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:27,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:28:27,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889561652] [2022-02-24 01:28:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:27,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:28:27,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:28:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:28:27,645 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 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 01:28:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:28,019 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-02-24 01:28:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:28:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have 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 01:28:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:28,020 INFO L225 Difference]: With dead ends: 153 [2022-02-24 01:28:28,020 INFO L226 Difference]: Without dead ends: 147 [2022-02-24 01:28:28,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:28:28,021 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 306 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:28,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 50 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-24 01:28:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2022-02-24 01:28:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 135 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-02-24 01:28:28,053 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 65 [2022-02-24 01:28:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:28,054 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-02-24 01:28:28,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-02-24 01:28:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 01:28:28,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:28,054 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:28,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:28:28,054 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 25 times [2022-02-24 01:28:28,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:28,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341480833] [2022-02-24 01:28:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:28,056 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:28,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:28,262 INFO 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 01:28:28,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:28,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341480833] [2022-02-24 01:28:28,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341480833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:28,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:28,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:28:28,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126339695] [2022-02-24 01:28:28,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:28:28,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:28:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:28:28,264 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:28,652 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-02-24 01:28:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:28:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 01:28:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:28,653 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:28:28,653 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:28:28,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:28:28,654 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 382 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 30 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:28:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-02-24 01:28:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 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 01:28:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-02-24 01:28:28,689 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 67 [2022-02-24 01:28:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-02-24 01:28:28,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-02-24 01:28:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:28:28,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:28,690 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:28,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:28:28,690 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:28,690 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 26 times [2022-02-24 01:28:28,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:28,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397766544] [2022-02-24 01:28:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:28,692 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:29,016 INFO 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 01:28:29,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:29,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397766544] [2022-02-24 01:28:29,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397766544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:29,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:29,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:28:29,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785903066] [2022-02-24 01:28:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:28:29,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:28:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:28:29,017 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 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 01:28:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:29,560 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-02-24 01:28:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:28:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 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 01:28:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:29,561 INFO L225 Difference]: With dead ends: 163 [2022-02-24 01:28:29,561 INFO L226 Difference]: Without dead ends: 157 [2022-02-24 01:28:29,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:28:29,562 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 434 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:29,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 40 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-24 01:28:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2022-02-24 01:28:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2022-02-24 01:28:29,609 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 69 [2022-02-24 01:28:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:29,609 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2022-02-24 01:28:29,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 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 01:28:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2022-02-24 01:28:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:28:29,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:29,610 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:29,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:28:29,610 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 27 times [2022-02-24 01:28:29,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:29,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107698360] [2022-02-24 01:28:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:29,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:29,612 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:29,932 INFO 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 01:28:29,932 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:29,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107698360] [2022-02-24 01:28:29,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1107698360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:29,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:29,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:28:29,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810874752] [2022-02-24 01:28:29,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:29,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:28:29,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:28:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:28:29,934 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:30,521 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-02-24 01:28:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:28:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 01:28:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:30,522 INFO L225 Difference]: With dead ends: 168 [2022-02-24 01:28:30,522 INFO L226 Difference]: Without dead ends: 162 [2022-02-24 01:28:30,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:28:30,524 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 339 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:30,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 50 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-24 01:28:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2022-02-24 01:28:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 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 01:28:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2022-02-24 01:28:30,553 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 71 [2022-02-24 01:28:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:30,554 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2022-02-24 01:28:30,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2022-02-24 01:28:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:28:30,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:30,554 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:30,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:28:30,554 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 28 times [2022-02-24 01:28:30,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:30,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012110586] [2022-02-24 01:28:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:30,556 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:30,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:30,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012110586] [2022-02-24 01:28:30,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012110586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:30,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:30,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:28:30,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901514181] [2022-02-24 01:28:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:28:30,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:28:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:28:30,917 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 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 01:28:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:31,597 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-02-24 01:28:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:28:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 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 01:28:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:31,598 INFO L225 Difference]: With dead ends: 173 [2022-02-24 01:28:31,598 INFO L226 Difference]: Without dead ends: 167 [2022-02-24 01:28:31,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:28:31,600 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 328 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:31,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 55 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-24 01:28:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2022-02-24 01:28:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 155 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2022-02-24 01:28:31,634 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 73 [2022-02-24 01:28:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:31,635 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2022-02-24 01:28:31,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 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 01:28:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2022-02-24 01:28:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:28:31,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:31,636 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:31,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:28:31,637 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 29 times [2022-02-24 01:28:31,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:31,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180325387] [2022-02-24 01:28:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:31,639 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:32,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:32,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180325387] [2022-02-24 01:28:32,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [180325387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:32,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:32,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:28:32,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460669933] [2022-02-24 01:28:32,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:32,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:28:32,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:28:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:28:32,022 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:32,717 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-02-24 01:28:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:28:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-24 01:28:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:32,718 INFO L225 Difference]: With dead ends: 178 [2022-02-24 01:28:32,718 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 01:28:32,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:28:32,719 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 443 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:32,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 45 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 01:28:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-02-24 01:28:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.19375) internal successors, (191), 160 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 01:28:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2022-02-24 01:28:32,754 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 75 [2022-02-24 01:28:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:32,754 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2022-02-24 01:28:32,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2022-02-24 01:28:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 01:28:32,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:32,755 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:32,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:28:32,755 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:32,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 30 times [2022-02-24 01:28:32,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:32,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644616166] [2022-02-24 01:28:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:32,756 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:33,159 INFO 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 01:28:33,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:33,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644616166] [2022-02-24 01:28:33,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644616166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:33,160 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:33,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:28:33,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085245380] [2022-02-24 01:28:33,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:33,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:28:33,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:28:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:28:33,161 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 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 01:28:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:33,936 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2022-02-24 01:28:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:28:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have 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 01:28:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:33,937 INFO L225 Difference]: With dead ends: 183 [2022-02-24 01:28:33,937 INFO L226 Difference]: Without dead ends: 177 [2022-02-24 01:28:33,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:28:33,938 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 516 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:33,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 35 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-24 01:28:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-02-24 01:28:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 165 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2022-02-24 01:28:33,973 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 77 [2022-02-24 01:28:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:33,974 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2022-02-24 01:28:33,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2022-02-24 01:28:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 01:28:33,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:33,974 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:33,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:28:33,975 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 31 times [2022-02-24 01:28:33,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:33,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515013105] [2022-02-24 01:28:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:33,976 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:34,391 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 01:28:34,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:34,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515013105] [2022-02-24 01:28:34,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515013105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:34,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:34,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:28:34,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29514067] [2022-02-24 01:28:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:28:34,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:28:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:28:34,393 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:35,168 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2022-02-24 01:28:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:28:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-24 01:28:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:35,169 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:28:35,169 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:28:35,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:28:35,170 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 451 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:35,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 55 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:28:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2022-02-24 01:28:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 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 01:28:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-02-24 01:28:35,207 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 79 [2022-02-24 01:28:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:35,207 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-02-24 01:28:35,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-02-24 01:28:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 01:28:35,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:35,208 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:28:35,208 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 32 times [2022-02-24 01:28:35,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:35,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413211910] [2022-02-24 01:28:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:35,209 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:35,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:35,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413211910] [2022-02-24 01:28:35,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413211910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:35,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:35,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 01:28:35,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260638461] [2022-02-24 01:28:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:35,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:28:35,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:28:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:28:35,643 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 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 01:28:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:36,448 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-02-24 01:28:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:28:36,449 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 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 01:28:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:36,449 INFO L225 Difference]: With dead ends: 193 [2022-02-24 01:28:36,449 INFO L226 Difference]: Without dead ends: 187 [2022-02-24 01:28:36,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:28:36,450 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 479 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:36,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 45 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-24 01:28:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2022-02-24 01:28:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2022-02-24 01:28:36,489 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 81 [2022-02-24 01:28:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:36,490 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2022-02-24 01:28:36,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 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 01:28:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2022-02-24 01:28:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 01:28:36,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:36,490 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:36,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:28:36,491 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 33 times [2022-02-24 01:28:36,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:36,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474992066] [2022-02-24 01:28:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:36,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:36,492 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:36,944 INFO 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 01:28:36,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:36,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474992066] [2022-02-24 01:28:36,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474992066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:36,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:36,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 01:28:36,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666813788] [2022-02-24 01:28:36,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:36,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 01:28:36,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:36,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 01:28:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:28:36,945 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:37,704 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-02-24 01:28:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:28:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 01:28:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:37,706 INFO L225 Difference]: With dead ends: 198 [2022-02-24 01:28:37,706 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 01:28:37,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:28:37,708 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 459 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:37,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 45 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 01:28:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2022-02-24 01:28:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 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 01:28:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2022-02-24 01:28:37,792 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 83 [2022-02-24 01:28:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:37,792 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2022-02-24 01:28:37,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2022-02-24 01:28:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 01:28:37,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:37,793 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:37,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:28:37,793 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 34 times [2022-02-24 01:28:37,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:37,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773829633] [2022-02-24 01:28:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:37,795 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:38,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:38,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:38,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773829633] [2022-02-24 01:28:38,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773829633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:38,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:38,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 01:28:38,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162677173] [2022-02-24 01:28:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:38,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 01:28:38,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 01:28:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:28:38,109 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 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 01:28:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:38,744 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2022-02-24 01:28:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:28:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 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 01:28:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:38,746 INFO L225 Difference]: With dead ends: 203 [2022-02-24 01:28:38,746 INFO L226 Difference]: Without dead ends: 197 [2022-02-24 01:28:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 01:28:38,747 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 496 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:38,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 45 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-24 01:28:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-02-24 01:28:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1945945945945946) internal successors, (221), 185 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2022-02-24 01:28:38,845 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 85 [2022-02-24 01:28:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:38,845 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2022-02-24 01:28:38,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 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 01:28:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2022-02-24 01:28:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 01:28:38,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:38,846 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:38,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:28:38,846 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 35 times [2022-02-24 01:28:38,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:38,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019851530] [2022-02-24 01:28:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:38,848 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:39,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:39,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019851530] [2022-02-24 01:28:39,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019851530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:39,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:39,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 01:28:39,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891999608] [2022-02-24 01:28:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 01:28:39,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 01:28:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:28:39,182 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:39,823 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-02-24 01:28:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 01:28:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-02-24 01:28:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:39,824 INFO L225 Difference]: With dead ends: 208 [2022-02-24 01:28:39,824 INFO L226 Difference]: Without dead ends: 202 [2022-02-24 01:28:39,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:28:39,825 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 542 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:39,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 55 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-24 01:28:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2022-02-24 01:28:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.194736842105263) internal successors, (227), 190 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 01:28:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-02-24 01:28:39,873 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 87 [2022-02-24 01:28:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-02-24 01:28:39,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-02-24 01:28:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 01:28:39,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:39,874 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:39,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:28:39,874 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 36 times [2022-02-24 01:28:39,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:39,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876761046] [2022-02-24 01:28:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:39,875 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:40,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:40,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876761046] [2022-02-24 01:28:40,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876761046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:40,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:40,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 01:28:40,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523736052] [2022-02-24 01:28:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:40,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 01:28:40,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 01:28:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:28:40,224 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 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 01:28:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:40,866 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2022-02-24 01:28:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:28:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 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 01:28:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:40,868 INFO L225 Difference]: With dead ends: 213 [2022-02-24 01:28:40,868 INFO L226 Difference]: Without dead ends: 207 [2022-02-24 01:28:40,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:28:40,869 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 513 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:40,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:28:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-24 01:28:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-02-24 01:28:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 195 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-02-24 01:28:40,919 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 89 [2022-02-24 01:28:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:40,919 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-02-24 01:28:40,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 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 01:28:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-02-24 01:28:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 01:28:40,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:40,920 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:40,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:28:40,920 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 37 times [2022-02-24 01:28:40,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:40,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414987914] [2022-02-24 01:28:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:40,921 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:41,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:41,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:41,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414987914] [2022-02-24 01:28:41,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [414987914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:41,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:41,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 01:28:41,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762614461] [2022-02-24 01:28:41,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:41,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 01:28:41,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 01:28:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:28:41,478 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:42,476 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-02-24 01:28:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:28:42,476 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-24 01:28:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:42,477 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:28:42,477 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:28:42,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 01:28:42,478 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 529 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:42,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 50 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:28:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2022-02-24 01:28:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.195) internal successors, (239), 200 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 01:28:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2022-02-24 01:28:42,532 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 91 [2022-02-24 01:28:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2022-02-24 01:28:42,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2022-02-24 01:28:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:28:42,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:42,533 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:42,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:28:42,533 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 38 times [2022-02-24 01:28:42,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:42,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442004428] [2022-02-24 01:28:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:42,534 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:43,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:43,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:43,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442004428] [2022-02-24 01:28:43,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442004428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:43,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:43,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 01:28:43,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867272693] [2022-02-24 01:28:43,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:43,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 01:28:43,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:43,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 01:28:43,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 01:28:43,145 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 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 01:28:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:44,221 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-02-24 01:28:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:28:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 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 01:28:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:44,222 INFO L225 Difference]: With dead ends: 223 [2022-02-24 01:28:44,222 INFO L226 Difference]: Without dead ends: 217 [2022-02-24 01:28:44,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:28:44,224 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 587 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:44,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 50 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:28:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-24 01:28:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2022-02-24 01:28:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 205 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-02-24 01:28:44,289 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 93 [2022-02-24 01:28:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:44,289 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-02-24 01:28:44,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 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 01:28:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-02-24 01:28:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 01:28:44,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:44,289 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:44,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:28:44,290 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 39 times [2022-02-24 01:28:44,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:44,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460286063] [2022-02-24 01:28:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:44,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:44,293 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:44,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:44,941 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:44,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460286063] [2022-02-24 01:28:44,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [460286063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:44,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:44,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 01:28:44,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684488262] [2022-02-24 01:28:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:44,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 01:28:44,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 01:28:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:28:44,942 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:45,891 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2022-02-24 01:28:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 01:28:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-24 01:28:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:45,892 INFO L225 Difference]: With dead ends: 228 [2022-02-24 01:28:45,892 INFO L226 Difference]: Without dead ends: 222 [2022-02-24 01:28:45,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 01:28:45,892 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 501 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:45,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 55 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-24 01:28:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-02-24 01:28:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.1952380952380952) internal successors, (251), 210 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 01:28:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2022-02-24 01:28:45,949 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 95 [2022-02-24 01:28:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:45,949 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2022-02-24 01:28:45,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2022-02-24 01:28:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 01:28:45,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:45,950 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:45,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:28:45,950 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 40 times [2022-02-24 01:28:45,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:45,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001071222] [2022-02-24 01:28:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:45,952 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:46,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:46,447 INFO 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 01:28:46,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001071222] [2022-02-24 01:28:46,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001071222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:46,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:46,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 01:28:46,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747342812] [2022-02-24 01:28:46,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:46,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 01:28:46,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 01:28:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 01:28:46,448 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 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 01:28:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:47,557 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2022-02-24 01:28:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:28:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 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 01:28:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:47,559 INFO L225 Difference]: With dead ends: 233 [2022-02-24 01:28:47,559 INFO L226 Difference]: Without dead ends: 227 [2022-02-24 01:28:47,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 01:28:47,560 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 769 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:47,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 40 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:28:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-24 01:28:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-02-24 01:28:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2022-02-24 01:28:47,620 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 97 [2022-02-24 01:28:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:47,620 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2022-02-24 01:28:47,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 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 01:28:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2022-02-24 01:28:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 01:28:47,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:47,620 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:47,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:28:47,621 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 41 times [2022-02-24 01:28:47,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:47,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779103614] [2022-02-24 01:28:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:47,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:47,622 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:48,293 INFO 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 01:28:48,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:48,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779103614] [2022-02-24 01:28:48,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779103614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:48,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:48,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 01:28:48,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156625778] [2022-02-24 01:28:48,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:48,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 01:28:48,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:48,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 01:28:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:28:48,294 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:49,305 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2022-02-24 01:28:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 01:28:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-02-24 01:28:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:49,306 INFO L225 Difference]: With dead ends: 238 [2022-02-24 01:28:49,306 INFO L226 Difference]: Without dead ends: 232 [2022-02-24 01:28:49,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 01:28:49,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 527 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:49,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 50 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-24 01:28:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2022-02-24 01:28:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.1954545454545455) internal successors, (263), 220 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 01:28:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 267 transitions. [2022-02-24 01:28:49,376 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 267 transitions. Word has length 99 [2022-02-24 01:28:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 267 transitions. [2022-02-24 01:28:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 267 transitions. [2022-02-24 01:28:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 01:28:49,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:49,379 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:28:49,380 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 42 times [2022-02-24 01:28:49,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:49,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775743448] [2022-02-24 01:28:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:49,381 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:50,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:50,071 INFO 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 01:28:50,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:50,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775743448] [2022-02-24 01:28:50,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [775743448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:50,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:50,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 01:28:50,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902631699] [2022-02-24 01:28:50,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:50,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 01:28:50,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 01:28:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:28:50,073 INFO L87 Difference]: Start difference. First operand 225 states and 267 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 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 01:28:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:51,109 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2022-02-24 01:28:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 01:28:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 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 01:28:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:51,110 INFO L225 Difference]: With dead ends: 243 [2022-02-24 01:28:51,110 INFO L226 Difference]: Without dead ends: 237 [2022-02-24 01:28:51,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:28:51,111 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 552 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:51,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 40 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-24 01:28:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-02-24 01:28:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1955555555555555) internal successors, (269), 225 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2022-02-24 01:28:51,176 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 101 [2022-02-24 01:28:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:51,176 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2022-02-24 01:28:51,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 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 01:28:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2022-02-24 01:28:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-24 01:28:51,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:51,177 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:51,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:28:51,177 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 43 times [2022-02-24 01:28:51,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:51,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593656290] [2022-02-24 01:28:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:51,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:51,179 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:52,002 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 01:28:52,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:52,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593656290] [2022-02-24 01:28:52,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [593656290] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:52,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:52,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 01:28:52,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566759860] [2022-02-24 01:28:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:52,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 01:28:52,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 01:28:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:28:52,004 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:53,374 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2022-02-24 01:28:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 01:28:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-02-24 01:28:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:53,375 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:28:53,375 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:28:53,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 01:28:53,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 697 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:53,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 40 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:28:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:28:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2022-02-24 01:28:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.1956521739130435) internal successors, (275), 230 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 01:28:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2022-02-24 01:28:53,443 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 103 [2022-02-24 01:28:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2022-02-24 01:28:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2022-02-24 01:28:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 01:28:53,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:53,444 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:53,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:28:53,444 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 44 times [2022-02-24 01:28:53,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:53,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877896195] [2022-02-24 01:28:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:53,445 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:54,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:54,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877896195] [2022-02-24 01:28:54,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877896195] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:54,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:54,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 01:28:54,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585801989] [2022-02-24 01:28:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:54,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 01:28:54,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 01:28:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 01:28:54,146 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 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 01:28:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:55,069 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2022-02-24 01:28:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:28:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 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 01:28:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:55,070 INFO L225 Difference]: With dead ends: 253 [2022-02-24 01:28:55,070 INFO L226 Difference]: Without dead ends: 247 [2022-02-24 01:28:55,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:28:55,071 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 578 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:55,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 50 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-24 01:28:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2022-02-24 01:28:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.195744680851064) internal successors, (281), 235 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2022-02-24 01:28:55,147 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 105 [2022-02-24 01:28:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:55,147 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2022-02-24 01:28:55,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 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 01:28:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2022-02-24 01:28:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 01:28:55,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:55,148 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:55,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:28:55,148 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 45 times [2022-02-24 01:28:55,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:55,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861256163] [2022-02-24 01:28:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:55,150 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:55,698 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 01:28:55,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:55,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861256163] [2022-02-24 01:28:55,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [861256163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:55,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:55,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 01:28:55,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418089118] [2022-02-24 01:28:55,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 01:28:55,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 01:28:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:28:55,700 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:56,602 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2022-02-24 01:28:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 01:28:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-02-24 01:28:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:56,605 INFO L225 Difference]: With dead ends: 258 [2022-02-24 01:28:56,605 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 01:28:56,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 01:28:56,606 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:56,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 75 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:28:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 01:28:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-02-24 01:28:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 240 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 01:28:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 291 transitions. [2022-02-24 01:28:56,680 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 291 transitions. Word has length 107 [2022-02-24 01:28:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:56,680 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 291 transitions. [2022-02-24 01:28:56,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 291 transitions. [2022-02-24 01:28:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 01:28:56,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:56,681 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:56,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:28:56,681 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 46 times [2022-02-24 01:28:56,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:56,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241268236] [2022-02-24 01:28:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:56,683 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:57,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:28:57,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:57,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241268236] [2022-02-24 01:28:57,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241268236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:57,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:57,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 01:28:57,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347963435] [2022-02-24 01:28:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:57,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 01:28:57,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 01:28:57,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:28:57,515 INFO L87 Difference]: Start difference. First operand 245 states and 291 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 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 01:28:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:28:58,798 INFO L93 Difference]: Finished difference Result 263 states and 311 transitions. [2022-02-24 01:28:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 01:28:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 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 01:28:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:28:58,800 INFO L225 Difference]: With dead ends: 263 [2022-02-24 01:28:58,800 INFO L226 Difference]: Without dead ends: 257 [2022-02-24 01:28:58,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 01:28:58,808 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 736 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:28:58,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 45 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:28:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-24 01:28:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-02-24 01:28:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 245 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:28:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 297 transitions. [2022-02-24 01:28:58,900 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 297 transitions. Word has length 109 [2022-02-24 01:28:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:28:58,900 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 297 transitions. [2022-02-24 01:28:58,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 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 01:28:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 297 transitions. [2022-02-24 01:28:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-24 01:28:58,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:28:58,901 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:28:58,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:28:58,901 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:28:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:28:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 47 times [2022-02-24 01:28:58,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:28:58,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473886235] [2022-02-24 01:28:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:28:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:28:58,903 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:28:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:28:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:28:59,720 INFO 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 01:28:59,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:28:59,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473886235] [2022-02-24 01:28:59,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473886235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:28:59,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:28:59,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 01:28:59,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978385947] [2022-02-24 01:28:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:28:59,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 01:28:59,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:28:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 01:28:59,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:28:59,726 INFO L87 Difference]: Start difference. First operand 250 states and 297 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:00,683 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-02-24 01:29:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:29:00,684 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-02-24 01:29:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:00,684 INFO L225 Difference]: With dead ends: 268 [2022-02-24 01:29:00,685 INFO L226 Difference]: Without dead ends: 262 [2022-02-24 01:29:00,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:29:00,686 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 623 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:00,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 50 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-24 01:29:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2022-02-24 01:29:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.196) internal successors, (299), 250 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 01:29:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 303 transitions. [2022-02-24 01:29:00,778 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 303 transitions. Word has length 111 [2022-02-24 01:29:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 303 transitions. [2022-02-24 01:29:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 303 transitions. [2022-02-24 01:29:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 01:29:00,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:00,779 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:29:00,779 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 48 times [2022-02-24 01:29:00,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:00,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896246110] [2022-02-24 01:29:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:00,781 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:01,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:01,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896246110] [2022-02-24 01:29:01,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896246110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:01,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:01,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 01:29:01,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973057033] [2022-02-24 01:29:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:01,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 01:29:01,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 01:29:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 01:29:01,453 INFO L87 Difference]: Start difference. First operand 255 states and 303 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 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 01:29:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:02,585 INFO L93 Difference]: Finished difference Result 273 states and 323 transitions. [2022-02-24 01:29:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:29:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 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 01:29:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:02,586 INFO L225 Difference]: With dead ends: 273 [2022-02-24 01:29:02,586 INFO L226 Difference]: Without dead ends: 267 [2022-02-24 01:29:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 01:29:02,587 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 699 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:02,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 40 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-24 01:29:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2022-02-24 01:29:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.196078431372549) internal successors, (305), 255 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2022-02-24 01:29:02,671 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 113 [2022-02-24 01:29:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:02,671 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2022-02-24 01:29:02,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 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 01:29:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2022-02-24 01:29:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-24 01:29:02,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:02,672 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:29:02,672 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 49 times [2022-02-24 01:29:02,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:02,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931217400] [2022-02-24 01:29:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:02,673 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:03,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:03,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:03,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931217400] [2022-02-24 01:29:03,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931217400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:03,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:03,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 01:29:03,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819110178] [2022-02-24 01:29:03,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:03,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 01:29:03,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 01:29:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:29:03,585 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:05,020 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2022-02-24 01:29:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 01:29:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-02-24 01:29:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:05,021 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:29:05,021 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:29:05,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 01:29:05,022 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 775 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:05,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 35 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:29:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-02-24 01:29:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 260 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 01:29:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-02-24 01:29:05,109 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 115 [2022-02-24 01:29:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:05,110 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-02-24 01:29:05,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-02-24 01:29:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 01:29:05,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:05,124 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:05,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:29:05,124 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 50 times [2022-02-24 01:29:05,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:05,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197821972] [2022-02-24 01:29:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:05,125 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:06,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:06,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197821972] [2022-02-24 01:29:06,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [197821972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:06,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:06,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 01:29:06,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024993883] [2022-02-24 01:29:06,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:06,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 01:29:06,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 01:29:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 01:29:06,060 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 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 01:29:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:07,708 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2022-02-24 01:29:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 01:29:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 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 01:29:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:07,709 INFO L225 Difference]: With dead ends: 283 [2022-02-24 01:29:07,709 INFO L226 Difference]: Without dead ends: 277 [2022-02-24 01:29:07,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4148, Invalid=7624, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 01:29:07,710 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 716 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:07,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 45 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-24 01:29:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2022-02-24 01:29:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.1962264150943396) internal successors, (317), 265 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2022-02-24 01:29:07,839 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 117 [2022-02-24 01:29:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:07,839 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2022-02-24 01:29:07,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 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 01:29:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2022-02-24 01:29:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 01:29:07,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:07,840 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:07,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:29:07,840 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 51 times [2022-02-24 01:29:07,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:07,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255857134] [2022-02-24 01:29:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:07,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:07,842 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:08,871 INFO 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 01:29:08,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:08,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255857134] [2022-02-24 01:29:08,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255857134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:08,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:08,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 01:29:08,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265350661] [2022-02-24 01:29:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 01:29:08,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 01:29:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:29:08,873 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:10,240 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2022-02-24 01:29:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:29:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-24 01:29:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:10,241 INFO L225 Difference]: With dead ends: 288 [2022-02-24 01:29:10,241 INFO L226 Difference]: Without dead ends: 282 [2022-02-24 01:29:10,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4307, Invalid=7903, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:29:10,242 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 753 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:10,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 45 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-24 01:29:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2022-02-24 01:29:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 270 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 01:29:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 327 transitions. [2022-02-24 01:29:10,357 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 327 transitions. Word has length 119 [2022-02-24 01:29:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:10,358 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 327 transitions. [2022-02-24 01:29:10,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 327 transitions. [2022-02-24 01:29:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 01:29:10,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:10,358 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:10,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:29:10,359 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 52 times [2022-02-24 01:29:10,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:10,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948271547] [2022-02-24 01:29:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:10,365 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:11,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:11,339 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 01:29:11,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:11,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948271547] [2022-02-24 01:29:11,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948271547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:11,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:11,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 01:29:11,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583907071] [2022-02-24 01:29:11,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:11,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 01:29:11,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 01:29:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=1815, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:29:11,356 INFO L87 Difference]: Start difference. First operand 275 states and 327 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 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 01:29:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:12,837 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-02-24 01:29:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 01:29:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 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 01:29:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:12,839 INFO L225 Difference]: With dead ends: 293 [2022-02-24 01:29:12,839 INFO L226 Difference]: Without dead ends: 287 [2022-02-24 01:29:12,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4469, Invalid=8187, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 01:29:12,855 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 859 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:12,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 45 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-24 01:29:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2022-02-24 01:29:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.1963636363636363) internal successors, (329), 275 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2022-02-24 01:29:12,999 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 121 [2022-02-24 01:29:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:12,999 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2022-02-24 01:29:12,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 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 01:29:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2022-02-24 01:29:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-24 01:29:12,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:12,999 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:13,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:29:13,000 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 53 times [2022-02-24 01:29:13,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:13,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129019876] [2022-02-24 01:29:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:13,001 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:13,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:13,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129019876] [2022-02-24 01:29:13,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129019876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:13,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:13,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 01:29:13,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487856922] [2022-02-24 01:29:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:13,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 01:29:13,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:13,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 01:29:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=1876, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:29:13,697 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:14,870 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2022-02-24 01:29:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:29:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-02-24 01:29:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:14,871 INFO L225 Difference]: With dead ends: 298 [2022-02-24 01:29:14,872 INFO L226 Difference]: Without dead ends: 292 [2022-02-24 01:29:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4634, Invalid=8476, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 01:29:14,872 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 884 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 40 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-24 01:29:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2022-02-24 01:29:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.1964285714285714) internal successors, (335), 280 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 01:29:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 339 transitions. [2022-02-24 01:29:14,974 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 339 transitions. Word has length 123 [2022-02-24 01:29:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:14,974 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 339 transitions. [2022-02-24 01:29:14,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 339 transitions. [2022-02-24 01:29:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-24 01:29:14,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:14,975 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:14,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:29:14,975 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 54 times [2022-02-24 01:29:14,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:14,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326369677] [2022-02-24 01:29:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:14,976 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:15,938 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:15,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326369677] [2022-02-24 01:29:15,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326369677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:15,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:15,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 01:29:15,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133082596] [2022-02-24 01:29:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 01:29:15,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 01:29:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 01:29:15,939 INFO L87 Difference]: Start difference. First operand 285 states and 339 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 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 01:29:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:17,680 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2022-02-24 01:29:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 01:29:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 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 01:29:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:17,681 INFO L225 Difference]: With dead ends: 303 [2022-02-24 01:29:17,681 INFO L226 Difference]: Without dead ends: 297 [2022-02-24 01:29:17,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4802, Invalid=8770, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 01:29:17,683 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 783 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:17,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 55 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-24 01:29:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-02-24 01:29:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1964912280701754) internal successors, (341), 285 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 345 transitions. [2022-02-24 01:29:17,799 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 345 transitions. Word has length 125 [2022-02-24 01:29:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:17,799 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 345 transitions. [2022-02-24 01:29:17,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 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 01:29:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 345 transitions. [2022-02-24 01:29:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-24 01:29:17,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:17,800 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:29:17,800 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 55 times [2022-02-24 01:29:17,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:17,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624674057] [2022-02-24 01:29:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:17,801 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:18,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:18,442 INFO 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 01:29:18,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:18,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624674057] [2022-02-24 01:29:18,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [624674057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:18,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:18,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 01:29:18,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392736364] [2022-02-24 01:29:18,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:18,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 01:29:18,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:18,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 01:29:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1659, Invalid=2001, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:29:18,444 INFO L87 Difference]: Start difference. First operand 290 states and 345 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:19,707 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2022-02-24 01:29:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 01:29:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-02-24 01:29:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:19,721 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:29:19,721 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:29:19,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4973, Invalid=9069, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 01:29:19,722 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 949 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:19,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 35 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:29:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-02-24 01:29:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.196551724137931) internal successors, (347), 290 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 01:29:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 351 transitions. [2022-02-24 01:29:19,846 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 351 transitions. Word has length 127 [2022-02-24 01:29:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:19,846 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 351 transitions. [2022-02-24 01:29:19,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 351 transitions. [2022-02-24 01:29:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 01:29:19,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:19,847 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:29:19,847 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 56 times [2022-02-24 01:29:19,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:19,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327781265] [2022-02-24 01:29:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:19,848 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:20,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:20,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327781265] [2022-02-24 01:29:20,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327781265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:20,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:20,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 01:29:20,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225955568] [2022-02-24 01:29:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:20,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 01:29:20,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 01:29:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1717, Invalid=2065, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 01:29:20,558 INFO L87 Difference]: Start difference. First operand 295 states and 351 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 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 01:29:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:21,898 INFO L93 Difference]: Finished difference Result 313 states and 371 transitions. [2022-02-24 01:29:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 01:29:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 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 01:29:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:21,899 INFO L225 Difference]: With dead ends: 313 [2022-02-24 01:29:21,899 INFO L226 Difference]: Without dead ends: 307 [2022-02-24 01:29:21,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5147, Invalid=9373, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 01:29:21,900 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 788 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:21,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 55 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-24 01:29:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2022-02-24 01:29:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2022-02-24 01:29:22,016 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 129 [2022-02-24 01:29:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:22,016 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2022-02-24 01:29:22,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 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 01:29:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2022-02-24 01:29:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-24 01:29:22,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:22,017 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:22,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:29:22,017 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 57 times [2022-02-24 01:29:22,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:22,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770957744] [2022-02-24 01:29:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:22,019 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:22,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:22,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770957744] [2022-02-24 01:29:22,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770957744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:22,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:22,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 01:29:22,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242036525] [2022-02-24 01:29:22,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:22,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 01:29:22,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 01:29:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:29:22,952 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:24,844 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2022-02-24 01:29:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 01:29:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-02-24 01:29:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:24,845 INFO L225 Difference]: With dead ends: 318 [2022-02-24 01:29:24,845 INFO L226 Difference]: Without dead ends: 312 [2022-02-24 01:29:24,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5324, Invalid=9682, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 01:29:24,846 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 831 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:24,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 55 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-24 01:29:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2022-02-24 01:29:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1966666666666668) internal successors, (359), 300 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 01:29:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-02-24 01:29:24,968 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 131 [2022-02-24 01:29:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:24,969 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-02-24 01:29:24,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-02-24 01:29:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-24 01:29:24,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:24,969 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:24,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:29:24,969 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 58 times [2022-02-24 01:29:24,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:24,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549079499] [2022-02-24 01:29:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:24,971 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:26,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:26,200 INFO 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 01:29:26,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:26,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549079499] [2022-02-24 01:29:26,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549079499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:26,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:26,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 01:29:26,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109135842] [2022-02-24 01:29:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:26,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 01:29:26,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 01:29:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1836, Invalid=2196, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 01:29:26,202 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 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 01:29:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:27,596 INFO L93 Difference]: Finished difference Result 323 states and 383 transitions. [2022-02-24 01:29:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 01:29:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 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 01:29:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:27,597 INFO L225 Difference]: With dead ends: 323 [2022-02-24 01:29:27,597 INFO L226 Difference]: Without dead ends: 317 [2022-02-24 01:29:27,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5504, Invalid=9996, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 01:29:27,598 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 943 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:27,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 45 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:29:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-24 01:29:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2022-02-24 01:29:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.1967213114754098) internal successors, (365), 305 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 369 transitions. [2022-02-24 01:29:27,725 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 369 transitions. Word has length 133 [2022-02-24 01:29:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:27,726 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 369 transitions. [2022-02-24 01:29:27,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 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 01:29:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 369 transitions. [2022-02-24 01:29:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-24 01:29:27,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:27,726 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:27,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:29:27,726 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 59 times [2022-02-24 01:29:27,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:27,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998197933] [2022-02-24 01:29:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:27,728 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:28,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:28,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:28,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998197933] [2022-02-24 01:29:28,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998197933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:28,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:28,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 01:29:28,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147927124] [2022-02-24 01:29:28,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:28,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 01:29:28,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 01:29:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=2263, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:29:28,935 INFO L87 Difference]: Start difference. First operand 310 states and 369 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:31,145 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2022-02-24 01:29:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 01:29:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-02-24 01:29:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:31,147 INFO L225 Difference]: With dead ends: 328 [2022-02-24 01:29:31,147 INFO L226 Difference]: Without dead ends: 322 [2022-02-24 01:29:31,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5687, Invalid=10315, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 01:29:31,148 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 851 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:31,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 60 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-24 01:29:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2022-02-24 01:29:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.196774193548387) internal successors, (371), 310 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 01:29:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2022-02-24 01:29:31,280 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 135 [2022-02-24 01:29:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2022-02-24 01:29:31,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2022-02-24 01:29:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 01:29:31,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:31,281 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:31,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:29:31,281 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 60 times [2022-02-24 01:29:31,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:31,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72300916] [2022-02-24 01:29:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:31,283 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:32,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:32,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:32,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72300916] [2022-02-24 01:29:32,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [72300916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:32,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:32,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 01:29:32,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555636368] [2022-02-24 01:29:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:32,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 01:29:32,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 01:29:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:29:32,479 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 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 01:29:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:34,707 INFO L93 Difference]: Finished difference Result 333 states and 395 transitions. [2022-02-24 01:29:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 01:29:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 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 01:29:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:34,708 INFO L225 Difference]: With dead ends: 333 [2022-02-24 01:29:34,708 INFO L226 Difference]: Without dead ends: 327 [2022-02-24 01:29:34,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5873, Invalid=10639, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 01:29:34,710 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 903 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:34,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 45 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-24 01:29:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 320. [2022-02-24 01:29:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1968253968253968) internal successors, (377), 315 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 381 transitions. [2022-02-24 01:29:34,851 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 381 transitions. Word has length 137 [2022-02-24 01:29:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:34,851 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 381 transitions. [2022-02-24 01:29:34,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 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 01:29:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 381 transitions. [2022-02-24 01:29:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 01:29:34,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:34,852 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:34,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:29:34,852 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 61 times [2022-02-24 01:29:34,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:34,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282979688] [2022-02-24 01:29:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:34,853 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:36,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:36,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:36,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282979688] [2022-02-24 01:29:36,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282979688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:36,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:36,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 01:29:36,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417362114] [2022-02-24 01:29:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:36,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 01:29:36,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 01:29:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2022, Invalid=2400, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:29:36,190 INFO L87 Difference]: Start difference. First operand 320 states and 381 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:38,259 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2022-02-24 01:29:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 01:29:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-24 01:29:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:38,260 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:29:38,260 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:29:38,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6062, Invalid=10968, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 01:29:38,261 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 817 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:38,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 65 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:29:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2022-02-24 01:29:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.196875) internal successors, (383), 320 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 01:29:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 387 transitions. [2022-02-24 01:29:38,392 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 387 transitions. Word has length 139 [2022-02-24 01:29:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:38,392 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 387 transitions. [2022-02-24 01:29:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 387 transitions. [2022-02-24 01:29:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-24 01:29:38,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:38,393 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:38,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:29:38,393 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 62 times [2022-02-24 01:29:38,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:38,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371503928] [2022-02-24 01:29:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:38,395 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:39,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:39,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371503928] [2022-02-24 01:29:39,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371503928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:39,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:39,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 01:29:39,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867320778] [2022-02-24 01:29:39,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:39,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 01:29:39,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 01:29:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2086, Invalid=2470, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 01:29:39,216 INFO L87 Difference]: Start difference. First operand 325 states and 387 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 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 01:29:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:40,797 INFO L93 Difference]: Finished difference Result 343 states and 407 transitions. [2022-02-24 01:29:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 01:29:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 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 01:29:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:40,798 INFO L225 Difference]: With dead ends: 343 [2022-02-24 01:29:40,799 INFO L226 Difference]: Without dead ends: 337 [2022-02-24 01:29:40,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6254, Invalid=11302, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 01:29:40,800 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1058 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:40,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 55 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-24 01:29:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 330. [2022-02-24 01:29:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.196923076923077) internal successors, (389), 325 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 393 transitions. [2022-02-24 01:29:40,946 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 393 transitions. Word has length 141 [2022-02-24 01:29:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:40,946 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 393 transitions. [2022-02-24 01:29:40,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 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 01:29:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 393 transitions. [2022-02-24 01:29:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-24 01:29:40,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:40,947 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:40,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:29:40,947 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 63 times [2022-02-24 01:29:40,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:40,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454652915] [2022-02-24 01:29:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:40,948 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:41,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:41,788 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:41,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454652915] [2022-02-24 01:29:41,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454652915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:41,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:41,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 01:29:41,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264542343] [2022-02-24 01:29:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:41,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 01:29:41,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 01:29:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:29:41,790 INFO L87 Difference]: Start difference. First operand 330 states and 393 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:43,449 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2022-02-24 01:29:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 01:29:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-02-24 01:29:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:43,451 INFO L225 Difference]: With dead ends: 348 [2022-02-24 01:29:43,451 INFO L226 Difference]: Without dead ends: 342 [2022-02-24 01:29:43,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6449, Invalid=11641, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 01:29:43,452 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1281 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:43,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 45 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-24 01:29:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2022-02-24 01:29:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.196969696969697) internal successors, (395), 330 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 01:29:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 399 transitions. [2022-02-24 01:29:43,599 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 399 transitions. Word has length 143 [2022-02-24 01:29:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:43,599 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 399 transitions. [2022-02-24 01:29:43,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 399 transitions. [2022-02-24 01:29:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 01:29:43,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:43,600 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:43,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:29:43,600 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 64 times [2022-02-24 01:29:43,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:43,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100099463] [2022-02-24 01:29:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:43,601 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:45,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:45,016 INFO 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 01:29:45,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:45,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100099463] [2022-02-24 01:29:45,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100099463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:45,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:45,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 01:29:45,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273325233] [2022-02-24 01:29:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:45,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 01:29:45,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 01:29:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=2613, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:29:45,018 INFO L87 Difference]: Start difference. First operand 335 states and 399 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 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 01:29:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:47,521 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2022-02-24 01:29:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 01:29:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 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 01:29:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:47,522 INFO L225 Difference]: With dead ends: 353 [2022-02-24 01:29:47,522 INFO L226 Difference]: Without dead ends: 347 [2022-02-24 01:29:47,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6647, Invalid=11985, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 01:29:47,523 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1039 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:47,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 50 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-24 01:29:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 340. [2022-02-24 01:29:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.1970149253731344) internal successors, (401), 335 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 405 transitions. [2022-02-24 01:29:47,674 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 405 transitions. Word has length 145 [2022-02-24 01:29:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:47,674 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 405 transitions. [2022-02-24 01:29:47,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 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 01:29:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 405 transitions. [2022-02-24 01:29:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-24 01:29:47,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:47,675 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:29:47,675 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 65 times [2022-02-24 01:29:47,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:47,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036407532] [2022-02-24 01:29:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:47,676 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:49,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:49,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:49,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036407532] [2022-02-24 01:29:49,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036407532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:49,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:49,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 01:29:49,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310284154] [2022-02-24 01:29:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:49,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 01:29:49,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 01:29:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2284, Invalid=2686, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:29:49,135 INFO L87 Difference]: Start difference. First operand 340 states and 405 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:51,260 INFO L93 Difference]: Finished difference Result 358 states and 425 transitions. [2022-02-24 01:29:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 01:29:51,261 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-02-24 01:29:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:51,269 INFO L225 Difference]: With dead ends: 358 [2022-02-24 01:29:51,269 INFO L226 Difference]: Without dead ends: 352 [2022-02-24 01:29:51,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6848, Invalid=12334, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 01:29:51,270 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 974 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:51,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 45 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:29:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-24 01:29:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 345. [2022-02-24 01:29:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 340 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 01:29:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 411 transitions. [2022-02-24 01:29:51,420 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 411 transitions. Word has length 147 [2022-02-24 01:29:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:51,420 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 411 transitions. [2022-02-24 01:29:51,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 411 transitions. [2022-02-24 01:29:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 01:29:51,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:51,421 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:29:51,421 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 66 times [2022-02-24 01:29:51,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:51,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802053341] [2022-02-24 01:29:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:51,422 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:52,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:52,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:52,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802053341] [2022-02-24 01:29:52,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [802053341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:52,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:52,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 01:29:52,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24387403] [2022-02-24 01:29:52,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:52,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 01:29:52,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 01:29:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:29:52,345 INFO L87 Difference]: Start difference. First operand 345 states and 411 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 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 01:29:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:54,761 INFO L93 Difference]: Finished difference Result 363 states and 431 transitions. [2022-02-24 01:29:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 01:29:54,761 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 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 01:29:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:54,762 INFO L225 Difference]: With dead ends: 363 [2022-02-24 01:29:54,763 INFO L226 Difference]: Without dead ends: 357 [2022-02-24 01:29:54,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7052, Invalid=12688, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 01:29:54,764 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1071 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:54,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 40 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-24 01:29:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 350. [2022-02-24 01:29:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.1971014492753622) internal successors, (413), 345 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 417 transitions. [2022-02-24 01:29:54,925 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 417 transitions. Word has length 149 [2022-02-24 01:29:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:54,925 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 417 transitions. [2022-02-24 01:29:54,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 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 01:29:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 417 transitions. [2022-02-24 01:29:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-24 01:29:54,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:54,926 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:54,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:29:54,926 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 67 times [2022-02-24 01:29:54,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:54,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035209656] [2022-02-24 01:29:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:54,927 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:29:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:29:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:29:56,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:29:56,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035209656] [2022-02-24 01:29:56,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035209656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:29:56,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:29:56,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 01:29:56,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900079938] [2022-02-24 01:29:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:29:56,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 01:29:56,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:29:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 01:29:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2421, Invalid=2835, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:29:56,500 INFO L87 Difference]: Start difference. First operand 350 states and 417 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:29:58,801 INFO L93 Difference]: Finished difference Result 368 states and 437 transitions. [2022-02-24 01:29:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 01:29:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-02-24 01:29:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:29:58,802 INFO L225 Difference]: With dead ends: 368 [2022-02-24 01:29:58,803 INFO L226 Difference]: Without dead ends: 362 [2022-02-24 01:29:58,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7259, Invalid=13047, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 01:29:58,804 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1246 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:29:58,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 50 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:29:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-24 01:29:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2022-02-24 01:29:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.197142857142857) internal successors, (419), 350 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 01:29:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 423 transitions. [2022-02-24 01:29:58,971 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 423 transitions. Word has length 151 [2022-02-24 01:29:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:29:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 423 transitions. [2022-02-24 01:29:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:29:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 423 transitions. [2022-02-24 01:29:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-24 01:29:58,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:29:58,972 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:29:58,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:29:58,972 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:29:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:29:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 68 times [2022-02-24 01:29:58,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:29:58,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281025350] [2022-02-24 01:29:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:29:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:29:58,973 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:29:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:00,193 INFO 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 01:30:00,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:00,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281025350] [2022-02-24 01:30:00,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [281025350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:00,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:00,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 01:30:00,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817713826] [2022-02-24 01:30:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:00,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 01:30:00,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 01:30:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2491, Invalid=2911, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 01:30:00,195 INFO L87 Difference]: Start difference. First operand 355 states and 423 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 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 01:30:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:02,311 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2022-02-24 01:30:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 01:30:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 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 01:30:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:02,312 INFO L225 Difference]: With dead ends: 373 [2022-02-24 01:30:02,313 INFO L226 Difference]: Without dead ends: 367 [2022-02-24 01:30:02,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7469, Invalid=13411, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 01:30:02,314 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:02,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 35 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-24 01:30:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 360. [2022-02-24 01:30:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.1971830985915493) internal successors, (425), 355 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 429 transitions. [2022-02-24 01:30:02,477 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 429 transitions. Word has length 153 [2022-02-24 01:30:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:02,478 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 429 transitions. [2022-02-24 01:30:02,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 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 01:30:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 429 transitions. [2022-02-24 01:30:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-24 01:30:02,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:02,478 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:30:02,478 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 69 times [2022-02-24 01:30:02,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:02,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961998929] [2022-02-24 01:30:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:02,480 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:03,620 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:03,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961998929] [2022-02-24 01:30:03,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [961998929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:03,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:03,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 01:30:03,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101977808] [2022-02-24 01:30:03,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:03,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 01:30:03,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 01:30:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:30:03,623 INFO L87 Difference]: Start difference. First operand 360 states and 429 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:05,592 INFO L93 Difference]: Finished difference Result 378 states and 449 transitions. [2022-02-24 01:30:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 01:30:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-02-24 01:30:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:05,593 INFO L225 Difference]: With dead ends: 378 [2022-02-24 01:30:05,593 INFO L226 Difference]: Without dead ends: 372 [2022-02-24 01:30:05,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7682, Invalid=13780, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 01:30:05,595 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1317 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:05,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 40 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-24 01:30:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2022-02-24 01:30:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.1972222222222222) internal successors, (431), 360 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 01:30:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 435 transitions. [2022-02-24 01:30:05,771 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 435 transitions. Word has length 155 [2022-02-24 01:30:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:05,771 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 435 transitions. [2022-02-24 01:30:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 435 transitions. [2022-02-24 01:30:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-24 01:30:05,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:05,772 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:05,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:30:05,772 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 70 times [2022-02-24 01:30:05,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:05,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878352451] [2022-02-24 01:30:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:05,774 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:07,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:07,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:07,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878352451] [2022-02-24 01:30:07,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [878352451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:07,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:07,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 01:30:07,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812377623] [2022-02-24 01:30:07,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:07,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 01:30:07,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 01:30:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2634, Invalid=3066, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 01:30:07,475 INFO L87 Difference]: Start difference. First operand 365 states and 435 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 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 01:30:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:09,507 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-02-24 01:30:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 01:30:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 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 01:30:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:09,509 INFO L225 Difference]: With dead ends: 383 [2022-02-24 01:30:09,509 INFO L226 Difference]: Without dead ends: 377 [2022-02-24 01:30:09,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7898, Invalid=14154, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 01:30:09,510 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1054 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:09,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 50 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-24 01:30:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-02-24 01:30:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1972602739726028) internal successors, (437), 365 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 441 transitions. [2022-02-24 01:30:09,716 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 441 transitions. Word has length 157 [2022-02-24 01:30:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:09,716 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 441 transitions. [2022-02-24 01:30:09,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 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 01:30:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 441 transitions. [2022-02-24 01:30:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-24 01:30:09,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:09,717 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:09,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:30:09,717 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 71 times [2022-02-24 01:30:09,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:09,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403380126] [2022-02-24 01:30:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:09,718 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:10,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:10,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:10,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403380126] [2022-02-24 01:30:10,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403380126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:10,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:10,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 01:30:10,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989408768] [2022-02-24 01:30:10,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:10,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 01:30:10,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 01:30:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=3145, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 01:30:10,803 INFO L87 Difference]: Start difference. First operand 370 states and 441 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:12,943 INFO L93 Difference]: Finished difference Result 388 states and 461 transitions. [2022-02-24 01:30:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 01:30:12,943 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-02-24 01:30:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:12,944 INFO L225 Difference]: With dead ends: 388 [2022-02-24 01:30:12,944 INFO L226 Difference]: Without dead ends: 382 [2022-02-24 01:30:12,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8117, Invalid=14533, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 01:30:12,945 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 45 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-24 01:30:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2022-02-24 01:30:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.1972972972972973) internal successors, (443), 370 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 447 transitions. [2022-02-24 01:30:13,131 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 447 transitions. Word has length 159 [2022-02-24 01:30:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:13,132 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 447 transitions. [2022-02-24 01:30:13,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 447 transitions. [2022-02-24 01:30:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-24 01:30:13,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:13,132 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:13,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:30:13,133 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 72 times [2022-02-24 01:30:13,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:13,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111517894] [2022-02-24 01:30:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:13,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:13,134 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:14,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:14,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:14,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111517894] [2022-02-24 01:30:14,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111517894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:14,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:14,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 01:30:14,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196634228] [2022-02-24 01:30:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 01:30:14,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 01:30:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:30:14,228 INFO L87 Difference]: Start difference. First operand 375 states and 447 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 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 01:30:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:16,373 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2022-02-24 01:30:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 01:30:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 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 01:30:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:16,374 INFO L225 Difference]: With dead ends: 393 [2022-02-24 01:30:16,374 INFO L226 Difference]: Without dead ends: 387 [2022-02-24 01:30:16,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8339, Invalid=14917, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 01:30:16,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1278 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:16,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 50 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-24 01:30:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 380. [2022-02-24 01:30:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.1973333333333334) internal successors, (449), 375 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-02-24 01:30:16,567 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 161 [2022-02-24 01:30:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:16,567 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-02-24 01:30:16,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 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 01:30:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-02-24 01:30:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-02-24 01:30:16,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:16,569 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:16,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:30:16,569 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 73 times [2022-02-24 01:30:16,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:16,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248817986] [2022-02-24 01:30:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:16,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:16,571 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:17,650 INFO 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 01:30:17,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:17,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248817986] [2022-02-24 01:30:17,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248817986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:17,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:17,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 01:30:17,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933984723] [2022-02-24 01:30:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:17,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 01:30:17,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 01:30:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2856, Invalid=3306, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:30:17,652 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:19,817 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2022-02-24 01:30:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 01:30:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-02-24 01:30:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:19,819 INFO L225 Difference]: With dead ends: 398 [2022-02-24 01:30:19,819 INFO L226 Difference]: Without dead ends: 392 [2022-02-24 01:30:19,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8564, Invalid=15306, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 01:30:19,823 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1156 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:19,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 55 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-24 01:30:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2022-02-24 01:30:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.1973684210526316) internal successors, (455), 380 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 459 transitions. [2022-02-24 01:30:20,016 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 459 transitions. Word has length 163 [2022-02-24 01:30:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:20,016 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 459 transitions. [2022-02-24 01:30:20,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 459 transitions. [2022-02-24 01:30:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-02-24 01:30:20,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:20,017 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:30:20,018 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 74 times [2022-02-24 01:30:20,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:20,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881605639] [2022-02-24 01:30:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:20,030 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:21,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:21,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881605639] [2022-02-24 01:30:21,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [881605639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:21,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:21,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 01:30:21,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905841282] [2022-02-24 01:30:21,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:21,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 01:30:21,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 01:30:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2932, Invalid=3388, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 01:30:21,342 INFO L87 Difference]: Start difference. First operand 385 states and 459 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 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 01:30:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:23,519 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2022-02-24 01:30:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 01:30:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 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 01:30:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:23,520 INFO L225 Difference]: With dead ends: 403 [2022-02-24 01:30:23,520 INFO L226 Difference]: Without dead ends: 397 [2022-02-24 01:30:23,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8792, Invalid=15700, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 01:30:23,522 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1067 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:23,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 55 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-24 01:30:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-02-24 01:30:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.1974025974025975) internal successors, (461), 385 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 465 transitions. [2022-02-24 01:30:23,721 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 465 transitions. Word has length 165 [2022-02-24 01:30:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:23,721 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 465 transitions. [2022-02-24 01:30:23,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 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 01:30:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 465 transitions. [2022-02-24 01:30:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-24 01:30:23,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:23,722 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:23,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:30:23,722 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 75 times [2022-02-24 01:30:23,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:23,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959561489] [2022-02-24 01:30:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:23,723 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:24,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:24,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:24,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959561489] [2022-02-24 01:30:24,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959561489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:24,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:24,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 01:30:24,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288970357] [2022-02-24 01:30:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:24,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 01:30:24,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 01:30:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:30:24,866 INFO L87 Difference]: Start difference. First operand 390 states and 465 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:27,561 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-02-24 01:30:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 01:30:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-02-24 01:30:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:27,563 INFO L225 Difference]: With dead ends: 408 [2022-02-24 01:30:27,563 INFO L226 Difference]: Without dead ends: 402 [2022-02-24 01:30:27,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9023, Invalid=16099, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 01:30:27,564 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1221 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:27,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 50 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:30:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-24 01:30:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-02-24 01:30:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.1974358974358974) internal successors, (467), 390 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-02-24 01:30:27,773 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 167 [2022-02-24 01:30:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:27,773 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-02-24 01:30:27,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-02-24 01:30:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-24 01:30:27,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:27,775 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:27,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:30:27,775 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 76 times [2022-02-24 01:30:27,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:27,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251362179] [2022-02-24 01:30:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:27,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:27,776 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:29,225 INFO 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 01:30:29,225 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:29,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251362179] [2022-02-24 01:30:29,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [251362179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:29,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:29,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 01:30:29,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661478148] [2022-02-24 01:30:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 01:30:29,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 01:30:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3087, Invalid=3555, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 01:30:29,228 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 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 01:30:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:31,938 INFO L93 Difference]: Finished difference Result 413 states and 491 transitions. [2022-02-24 01:30:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 01:30:31,938 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 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 01:30:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:31,939 INFO L225 Difference]: With dead ends: 413 [2022-02-24 01:30:31,939 INFO L226 Difference]: Without dead ends: 407 [2022-02-24 01:30:31,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9257, Invalid=16503, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 01:30:31,941 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1156 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:31,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 55 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:30:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-24 01:30:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2022-02-24 01:30:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1974683544303797) internal successors, (473), 395 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 477 transitions. [2022-02-24 01:30:32,151 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 477 transitions. Word has length 169 [2022-02-24 01:30:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:32,151 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 477 transitions. [2022-02-24 01:30:32,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 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 01:30:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 477 transitions. [2022-02-24 01:30:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-02-24 01:30:32,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:32,152 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:32,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:30:32,152 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 77 times [2022-02-24 01:30:32,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:32,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150322166] [2022-02-24 01:30:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:32,153 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:33,742 INFO 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 01:30:33,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:33,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150322166] [2022-02-24 01:30:33,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [150322166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:33,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:33,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 01:30:33,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796105021] [2022-02-24 01:30:33,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 01:30:33,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 01:30:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3166, Invalid=3640, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 01:30:33,744 INFO L87 Difference]: Start difference. First operand 400 states and 477 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:37,221 INFO L93 Difference]: Finished difference Result 418 states and 497 transitions. [2022-02-24 01:30:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 01:30:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-02-24 01:30:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:37,223 INFO L225 Difference]: With dead ends: 418 [2022-02-24 01:30:37,223 INFO L226 Difference]: Without dead ends: 412 [2022-02-24 01:30:37,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9494, Invalid=16912, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 01:30:37,224 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1214 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:37,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 50 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:30:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-02-24 01:30:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 405. [2022-02-24 01:30:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.1975) internal successors, (479), 400 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 483 transitions. [2022-02-24 01:30:37,451 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 483 transitions. Word has length 171 [2022-02-24 01:30:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:37,451 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 483 transitions. [2022-02-24 01:30:37,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 483 transitions. [2022-02-24 01:30:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-24 01:30:37,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:37,452 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:37,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:30:37,452 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 78 times [2022-02-24 01:30:37,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:37,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354567680] [2022-02-24 01:30:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:37,454 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:38,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:38,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:38,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354567680] [2022-02-24 01:30:38,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354567680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:38,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:38,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 01:30:38,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004272952] [2022-02-24 01:30:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:38,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 01:30:38,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 01:30:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 01:30:38,660 INFO L87 Difference]: Start difference. First operand 405 states and 483 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 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 01:30:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:42,047 INFO L93 Difference]: Finished difference Result 423 states and 503 transitions. [2022-02-24 01:30:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 01:30:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 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 01:30:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:42,048 INFO L225 Difference]: With dead ends: 423 [2022-02-24 01:30:42,048 INFO L226 Difference]: Without dead ends: 417 [2022-02-24 01:30:42,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9734, Invalid=17326, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 01:30:42,050 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1152 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:42,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 55 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:30:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-24 01:30:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 410. [2022-02-24 01:30:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.1975308641975309) internal successors, (485), 405 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 489 transitions. [2022-02-24 01:30:42,270 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 489 transitions. Word has length 173 [2022-02-24 01:30:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:42,270 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 489 transitions. [2022-02-24 01:30:42,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 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 01:30:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 489 transitions. [2022-02-24 01:30:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-24 01:30:42,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:42,271 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:42,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 01:30:42,271 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 79 times [2022-02-24 01:30:42,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:42,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612768361] [2022-02-24 01:30:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:42,273 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:43,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:43,521 INFO 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 01:30:43,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:43,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612768361] [2022-02-24 01:30:43,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [612768361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:43,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:43,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 01:30:43,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243911307] [2022-02-24 01:30:43,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:43,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 01:30:43,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 01:30:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3327, Invalid=3813, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:30:43,523 INFO L87 Difference]: Start difference. First operand 410 states and 489 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:46,050 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-02-24 01:30:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 01:30:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-02-24 01:30:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:46,052 INFO L225 Difference]: With dead ends: 428 [2022-02-24 01:30:46,052 INFO L226 Difference]: Without dead ends: 422 [2022-02-24 01:30:46,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9977, Invalid=17745, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 01:30:46,060 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1243 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:46,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 45 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-24 01:30:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2022-02-24 01:30:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.197560975609756) internal successors, (491), 410 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 495 transitions. [2022-02-24 01:30:46,281 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 495 transitions. Word has length 175 [2022-02-24 01:30:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:46,281 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 495 transitions. [2022-02-24 01:30:46,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 495 transitions. [2022-02-24 01:30:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-02-24 01:30:46,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:46,286 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:46,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 01:30:46,286 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 80 times [2022-02-24 01:30:46,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:46,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614175706] [2022-02-24 01:30:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:46,287 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:30:48,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:48,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614175706] [2022-02-24 01:30:48,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [614175706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:48,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:48,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 01:30:48,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132022583] [2022-02-24 01:30:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:48,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 01:30:48,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 01:30:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3409, Invalid=3901, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 01:30:48,096 INFO L87 Difference]: Start difference. First operand 415 states and 495 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 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 01:30:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:50,627 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2022-02-24 01:30:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 01:30:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 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 01:30:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:50,628 INFO L225 Difference]: With dead ends: 433 [2022-02-24 01:30:50,628 INFO L226 Difference]: Without dead ends: 427 [2022-02-24 01:30:50,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10223, Invalid=18169, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 01:30:50,630 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1478 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:50,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 40 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:30:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-24 01:30:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2022-02-24 01:30:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1975903614457832) internal successors, (497), 415 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 501 transitions. [2022-02-24 01:30:50,861 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 501 transitions. Word has length 177 [2022-02-24 01:30:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:50,861 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 501 transitions. [2022-02-24 01:30:50,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 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 01:30:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 501 transitions. [2022-02-24 01:30:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-24 01:30:50,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:50,862 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:50,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 01:30:50,862 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 81 times [2022-02-24 01:30:50,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:50,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743469188] [2022-02-24 01:30:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:50,864 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:53,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:53,035 INFO 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 01:30:53,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:53,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743469188] [2022-02-24 01:30:53,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743469188] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:53,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:53,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 01:30:53,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012284868] [2022-02-24 01:30:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 01:30:53,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 01:30:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 01:30:53,037 INFO L87 Difference]: Start difference. First operand 420 states and 501 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:30:56,420 INFO L93 Difference]: Finished difference Result 438 states and 521 transitions. [2022-02-24 01:30:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 01:30:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-24 01:30:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:30:56,422 INFO L225 Difference]: With dead ends: 438 [2022-02-24 01:30:56,422 INFO L226 Difference]: Without dead ends: 432 [2022-02-24 01:30:56,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10472, Invalid=18598, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 01:30:56,423 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1404 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:30:56,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 45 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:30:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-24 01:30:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2022-02-24 01:30:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 420 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 507 transitions. [2022-02-24 01:30:56,660 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 507 transitions. Word has length 179 [2022-02-24 01:30:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:30:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 507 transitions. [2022-02-24 01:30:56,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:30:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 507 transitions. [2022-02-24 01:30:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-24 01:30:56,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:30:56,661 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:30:56,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 01:30:56,662 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:30:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:30:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 82 times [2022-02-24 01:30:56,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:30:56,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389338509] [2022-02-24 01:30:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:30:56,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:30:56,663 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:30:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:30:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:30:57,959 INFO 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 01:30:57,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:30:57,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389338509] [2022-02-24 01:30:57,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [389338509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:30:57,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:30:57,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-24 01:30:57,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532197210] [2022-02-24 01:30:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:30:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-24 01:30:57,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:30:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-24 01:30:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3576, Invalid=4080, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 01:30:57,961 INFO L87 Difference]: Start difference. First operand 425 states and 507 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 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 01:31:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:01,103 INFO L93 Difference]: Finished difference Result 443 states and 527 transitions. [2022-02-24 01:31:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-24 01:31:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 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 01:31:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:01,105 INFO L225 Difference]: With dead ends: 443 [2022-02-24 01:31:01,105 INFO L226 Difference]: Without dead ends: 437 [2022-02-24 01:31:01,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10724, Invalid=19032, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 01:31:01,106 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1411 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:01,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 40 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-24 01:31:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 430. [2022-02-24 01:31:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.1976470588235295) internal successors, (509), 425 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 513 transitions. [2022-02-24 01:31:01,350 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 513 transitions. Word has length 181 [2022-02-24 01:31:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:01,350 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 513 transitions. [2022-02-24 01:31:01,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 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 01:31:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 513 transitions. [2022-02-24 01:31:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-02-24 01:31:01,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:01,351 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 01:31:01,351 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 83 times [2022-02-24 01:31:01,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:01,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057843542] [2022-02-24 01:31:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:01,353 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:31:03,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:03,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057843542] [2022-02-24 01:31:03,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057843542] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:03,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:03,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 01:31:03,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220577410] [2022-02-24 01:31:03,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:03,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 01:31:03,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 01:31:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3661, Invalid=4171, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 01:31:03,505 INFO L87 Difference]: Start difference. First operand 430 states and 513 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:06,974 INFO L93 Difference]: Finished difference Result 448 states and 533 transitions. [2022-02-24 01:31:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 01:31:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-02-24 01:31:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:06,975 INFO L225 Difference]: With dead ends: 448 [2022-02-24 01:31:06,975 INFO L226 Difference]: Without dead ends: 442 [2022-02-24 01:31:06,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3903 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10979, Invalid=19471, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 01:31:06,976 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1406 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:06,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 50 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-24 01:31:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2022-02-24 01:31:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.197674418604651) internal successors, (515), 430 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 519 transitions. [2022-02-24 01:31:07,231 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 519 transitions. Word has length 183 [2022-02-24 01:31:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:07,231 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 519 transitions. [2022-02-24 01:31:07,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 519 transitions. [2022-02-24 01:31:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-24 01:31:07,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:07,232 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:07,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 01:31:07,232 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 84 times [2022-02-24 01:31:07,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:07,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730998525] [2022-02-24 01:31:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:07,233 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:31:09,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:09,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730998525] [2022-02-24 01:31:09,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730998525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:09,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:09,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 01:31:09,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853243866] [2022-02-24 01:31:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:09,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 01:31:09,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:09,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 01:31:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:31:09,142 INFO L87 Difference]: Start difference. First operand 435 states and 519 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 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 01:31:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:12,025 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2022-02-24 01:31:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 01:31:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 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 01:31:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:12,027 INFO L225 Difference]: With dead ends: 453 [2022-02-24 01:31:12,027 INFO L226 Difference]: Without dead ends: 447 [2022-02-24 01:31:12,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3992 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11237, Invalid=19915, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 01:31:12,028 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1272 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:12,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 50 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:31:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-24 01:31:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2022-02-24 01:31:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1977011494252874) internal successors, (521), 435 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 525 transitions. [2022-02-24 01:31:12,284 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 525 transitions. Word has length 185 [2022-02-24 01:31:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 525 transitions. [2022-02-24 01:31:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 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 01:31:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 525 transitions. [2022-02-24 01:31:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-24 01:31:12,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:12,285 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:12,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 01:31:12,285 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 85 times [2022-02-24 01:31:12,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:12,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686280004] [2022-02-24 01:31:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:12,287 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:13,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:13,656 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 01:31:13,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:13,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686280004] [2022-02-24 01:31:13,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [686280004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:13,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:13,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 01:31:13,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032992661] [2022-02-24 01:31:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 01:31:13,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 01:31:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3834, Invalid=4356, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 01:31:13,658 INFO L87 Difference]: Start difference. First operand 440 states and 525 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:17,079 INFO L93 Difference]: Finished difference Result 458 states and 545 transitions. [2022-02-24 01:31:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 01:31:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-02-24 01:31:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:17,081 INFO L225 Difference]: With dead ends: 458 [2022-02-24 01:31:17,081 INFO L226 Difference]: Without dead ends: 452 [2022-02-24 01:31:17,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11498, Invalid=20364, Unknown=0, NotChecked=0, Total=31862 [2022-02-24 01:31:17,082 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:17,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 55 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-24 01:31:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 445. [2022-02-24 01:31:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.1977272727272728) internal successors, (527), 440 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 531 transitions. [2022-02-24 01:31:17,344 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 531 transitions. Word has length 187 [2022-02-24 01:31:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 531 transitions. [2022-02-24 01:31:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 531 transitions. [2022-02-24 01:31:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-02-24 01:31:17,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:17,345 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:17,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 01:31:17,345 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 86 times [2022-02-24 01:31:17,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:17,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397297731] [2022-02-24 01:31:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:17,346 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:31:18,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:18,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397297731] [2022-02-24 01:31:18,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397297731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:18,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:18,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 01:31:18,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015108526] [2022-02-24 01:31:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:18,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 01:31:18,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 01:31:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3922, Invalid=4450, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 01:31:18,749 INFO L87 Difference]: Start difference. First operand 445 states and 531 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 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 01:31:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:22,049 INFO L93 Difference]: Finished difference Result 463 states and 551 transitions. [2022-02-24 01:31:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 01:31:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 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 01:31:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:22,050 INFO L225 Difference]: With dead ends: 463 [2022-02-24 01:31:22,050 INFO L226 Difference]: Without dead ends: 457 [2022-02-24 01:31:22,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11762, Invalid=20818, Unknown=0, NotChecked=0, Total=32580 [2022-02-24 01:31:22,052 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1400 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:22,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 55 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-24 01:31:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 450. [2022-02-24 01:31:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.1977528089887641) internal successors, (533), 445 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 537 transitions. [2022-02-24 01:31:22,326 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 537 transitions. Word has length 189 [2022-02-24 01:31:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:22,327 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 537 transitions. [2022-02-24 01:31:22,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 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 01:31:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 537 transitions. [2022-02-24 01:31:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-24 01:31:22,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:22,328 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:22,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 01:31:22,328 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:22,328 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 87 times [2022-02-24 01:31:22,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:22,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463335551] [2022-02-24 01:31:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:22,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:22,329 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:24,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:24,803 INFO 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 01:31:24,803 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:24,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463335551] [2022-02-24 01:31:24,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463335551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:24,803 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:24,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 01:31:24,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901036642] [2022-02-24 01:31:24,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:24,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 01:31:24,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 01:31:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:31:24,805 INFO L87 Difference]: Start difference. First operand 450 states and 537 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:28,787 INFO L93 Difference]: Finished difference Result 468 states and 557 transitions. [2022-02-24 01:31:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 01:31:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-02-24 01:31:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:28,788 INFO L225 Difference]: With dead ends: 468 [2022-02-24 01:31:28,788 INFO L226 Difference]: Without dead ends: 462 [2022-02-24 01:31:28,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4265 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12029, Invalid=21277, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 01:31:28,790 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1614 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 40 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:31:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-02-24 01:31:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2022-02-24 01:31:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.1977777777777778) internal successors, (539), 450 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 543 transitions. [2022-02-24 01:31:29,070 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 543 transitions. Word has length 191 [2022-02-24 01:31:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:29,071 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 543 transitions. [2022-02-24 01:31:29,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 543 transitions. [2022-02-24 01:31:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-02-24 01:31:29,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:29,075 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 01:31:29,075 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 88 times [2022-02-24 01:31:29,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:29,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128452111] [2022-02-24 01:31:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:29,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:29,079 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:31,648 INFO 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 01:31:31,648 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:31,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128452111] [2022-02-24 01:31:31,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128452111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:31,648 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:31,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 01:31:31,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034188865] [2022-02-24 01:31:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:31,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 01:31:31,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 01:31:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4101, Invalid=4641, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 01:31:31,650 INFO L87 Difference]: Start difference. First operand 455 states and 543 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 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 01:31:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:35,854 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-02-24 01:31:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 01:31:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 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 01:31:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:35,855 INFO L225 Difference]: With dead ends: 473 [2022-02-24 01:31:35,855 INFO L226 Difference]: Without dead ends: 467 [2022-02-24 01:31:35,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12299, Invalid=21741, Unknown=0, NotChecked=0, Total=34040 [2022-02-24 01:31:35,858 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1399 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:35,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 50 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:31:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-02-24 01:31:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 460. [2022-02-24 01:31:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.1978021978021978) internal successors, (545), 455 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 549 transitions. [2022-02-24 01:31:36,145 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 549 transitions. Word has length 193 [2022-02-24 01:31:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:36,145 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 549 transitions. [2022-02-24 01:31:36,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 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 01:31:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 549 transitions. [2022-02-24 01:31:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-02-24 01:31:36,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:36,146 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:36,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 01:31:36,146 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 89 times [2022-02-24 01:31:36,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:36,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642021030] [2022-02-24 01:31:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:36,147 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:37,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:37,880 INFO 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 01:31:37,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:37,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642021030] [2022-02-24 01:31:37,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642021030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:37,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:37,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 01:31:37,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944279748] [2022-02-24 01:31:37,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 01:31:37,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 01:31:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4192, Invalid=4738, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 01:31:37,882 INFO L87 Difference]: Start difference. First operand 460 states and 549 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:41,081 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2022-02-24 01:31:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 01:31:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-02-24 01:31:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:41,083 INFO L225 Difference]: With dead ends: 478 [2022-02-24 01:31:41,083 INFO L226 Difference]: Without dead ends: 472 [2022-02-24 01:31:41,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12572, Invalid=22210, Unknown=0, NotChecked=0, Total=34782 [2022-02-24 01:31:41,084 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1385 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:41,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 50 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:31:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-24 01:31:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 465. [2022-02-24 01:31:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 460 states have (on average 1.1978260869565218) internal successors, (551), 460 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-02-24 01:31:41,388 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 195 [2022-02-24 01:31:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:41,388 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-02-24 01:31:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-02-24 01:31:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-24 01:31:41,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:41,389 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:41,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 01:31:41,390 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 90 times [2022-02-24 01:31:41,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:41,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203086723] [2022-02-24 01:31:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:41,391 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:43,013 INFO 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 01:31:43,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:43,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203086723] [2022-02-24 01:31:43,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203086723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:43,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:43,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 01:31:43,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195880181] [2022-02-24 01:31:43,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:43,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 01:31:43,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 01:31:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 01:31:43,017 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 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 01:31:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:46,275 INFO L93 Difference]: Finished difference Result 483 states and 575 transitions. [2022-02-24 01:31:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 01:31:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 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 01:31:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:46,277 INFO L225 Difference]: With dead ends: 483 [2022-02-24 01:31:46,277 INFO L226 Difference]: Without dead ends: 477 [2022-02-24 01:31:46,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12848, Invalid=22684, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 01:31:46,279 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1458 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 45 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-24 01:31:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 470. [2022-02-24 01:31:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.1978494623655913) internal successors, (557), 465 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 561 transitions. [2022-02-24 01:31:46,577 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 561 transitions. Word has length 197 [2022-02-24 01:31:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:46,577 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 561 transitions. [2022-02-24 01:31:46,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 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 01:31:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 561 transitions. [2022-02-24 01:31:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-24 01:31:46,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:46,578 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:46,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 01:31:46,578 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 91 times [2022-02-24 01:31:46,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:46,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752995466] [2022-02-24 01:31:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:46,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:46,584 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:31:48,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:48,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752995466] [2022-02-24 01:31:48,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [752995466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:48,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:48,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 01:31:48,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912675102] [2022-02-24 01:31:48,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:48,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 01:31:48,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 01:31:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4377, Invalid=4935, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:31:48,178 INFO L87 Difference]: Start difference. First operand 470 states and 561 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:51,460 INFO L93 Difference]: Finished difference Result 488 states and 581 transitions. [2022-02-24 01:31:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 01:31:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-02-24 01:31:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:51,462 INFO L225 Difference]: With dead ends: 488 [2022-02-24 01:31:51,462 INFO L226 Difference]: Without dead ends: 482 [2022-02-24 01:31:51,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13127, Invalid=23163, Unknown=0, NotChecked=0, Total=36290 [2022-02-24 01:31:51,463 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1288 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:51,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 65 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-24 01:31:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2022-02-24 01:31:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.1978723404255318) internal successors, (563), 470 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 567 transitions. [2022-02-24 01:31:51,761 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 567 transitions. Word has length 199 [2022-02-24 01:31:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:51,761 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 567 transitions. [2022-02-24 01:31:51,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 567 transitions. [2022-02-24 01:31:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-24 01:31:51,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:51,762 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 01:31:51,763 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 92 times [2022-02-24 01:31:51,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:51,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685894531] [2022-02-24 01:31:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:51,764 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:53,341 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 01:31:53,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:53,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685894531] [2022-02-24 01:31:53,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685894531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:53,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:53,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 01:31:53,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707844513] [2022-02-24 01:31:53,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:53,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 01:31:53,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 01:31:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4471, Invalid=5035, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 01:31:53,343 INFO L87 Difference]: Start difference. First operand 475 states and 567 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 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 01:31:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:31:56,828 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-02-24 01:31:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 01:31:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 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 01:31:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:31:56,830 INFO L225 Difference]: With dead ends: 493 [2022-02-24 01:31:56,830 INFO L226 Difference]: Without dead ends: 487 [2022-02-24 01:31:56,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13409, Invalid=23647, Unknown=0, NotChecked=0, Total=37056 [2022-02-24 01:31:56,831 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1451 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:31:56,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 45 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:31:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-02-24 01:31:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-02-24 01:31:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.1978947368421053) internal successors, (569), 475 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:31:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 573 transitions. [2022-02-24 01:31:57,139 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 573 transitions. Word has length 201 [2022-02-24 01:31:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:31:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 573 transitions. [2022-02-24 01:31:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 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 01:31:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 573 transitions. [2022-02-24 01:31:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-24 01:31:57,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:31:57,141 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:31:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 01:31:57,141 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:31:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:31:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 93 times [2022-02-24 01:31:57,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:31:57,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180368980] [2022-02-24 01:31:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:31:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:31:57,145 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:31:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:31:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:31:58,771 INFO 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 01:31:58,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:31:58,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180368980] [2022-02-24 01:31:58,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [180368980] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:31:58,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:31:58,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 01:31:58,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252402662] [2022-02-24 01:31:58,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:31:58,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 01:31:58,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:31:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 01:31:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 01:31:58,780 INFO L87 Difference]: Start difference. First operand 480 states and 573 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:02,256 INFO L93 Difference]: Finished difference Result 498 states and 593 transitions. [2022-02-24 01:32:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 01:32:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-24 01:32:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:02,257 INFO L225 Difference]: With dead ends: 498 [2022-02-24 01:32:02,257 INFO L226 Difference]: Without dead ends: 492 [2022-02-24 01:32:02,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4838 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=13694, Invalid=24136, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 01:32:02,259 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1461 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:02,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 50 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-24 01:32:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2022-02-24 01:32:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1979166666666667) internal successors, (575), 480 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2022-02-24 01:32:02,578 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 203 [2022-02-24 01:32:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:02,578 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2022-02-24 01:32:02,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2022-02-24 01:32:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-02-24 01:32:02,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:02,579 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:02,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 01:32:02,580 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 94 times [2022-02-24 01:32:02,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:02,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681243986] [2022-02-24 01:32:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:02,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:02,583 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:04,242 INFO 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 01:32:04,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:04,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681243986] [2022-02-24 01:32:04,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681243986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:04,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:04,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-24 01:32:04,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592730777] [2022-02-24 01:32:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:04,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-24 01:32:04,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-24 01:32:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4662, Invalid=5238, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 01:32:04,246 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 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 01:32:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:07,776 INFO L93 Difference]: Finished difference Result 503 states and 599 transitions. [2022-02-24 01:32:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-24 01:32:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 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 01:32:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:07,778 INFO L225 Difference]: With dead ends: 503 [2022-02-24 01:32:07,778 INFO L226 Difference]: Without dead ends: 497 [2022-02-24 01:32:07,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=13982, Invalid=24630, Unknown=0, NotChecked=0, Total=38612 [2022-02-24 01:32:07,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1693 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:07,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 40 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-02-24 01:32:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 490. [2022-02-24 01:32:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.1979381443298969) internal successors, (581), 485 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 585 transitions. [2022-02-24 01:32:08,099 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 585 transitions. Word has length 205 [2022-02-24 01:32:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 585 transitions. [2022-02-24 01:32:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 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 01:32:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 585 transitions. [2022-02-24 01:32:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-24 01:32:08,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:08,100 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 01:32:08,100 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 95 times [2022-02-24 01:32:08,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:08,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387678297] [2022-02-24 01:32:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:08,108 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:09,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:32:09,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:09,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387678297] [2022-02-24 01:32:09,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387678297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:09,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:09,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 01:32:09,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14864148] [2022-02-24 01:32:09,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:09,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 01:32:09,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 01:32:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4759, Invalid=5341, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 01:32:09,820 INFO L87 Difference]: Start difference. First operand 490 states and 585 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:13,445 INFO L93 Difference]: Finished difference Result 508 states and 605 transitions. [2022-02-24 01:32:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 01:32:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-02-24 01:32:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:13,447 INFO L225 Difference]: With dead ends: 508 [2022-02-24 01:32:13,447 INFO L226 Difference]: Without dead ends: 502 [2022-02-24 01:32:13,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=14273, Invalid=25129, Unknown=0, NotChecked=0, Total=39402 [2022-02-24 01:32:13,448 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1535 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:13,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 50 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-24 01:32:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2022-02-24 01:32:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.1979591836734693) internal successors, (587), 490 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 591 transitions. [2022-02-24 01:32:13,776 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 591 transitions. Word has length 207 [2022-02-24 01:32:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:13,776 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 591 transitions. [2022-02-24 01:32:13,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 591 transitions. [2022-02-24 01:32:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-24 01:32:13,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:13,777 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:13,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 01:32:13,777 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 96 times [2022-02-24 01:32:13,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:13,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046854540] [2022-02-24 01:32:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:13,779 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:15,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:15,521 INFO 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 01:32:15,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:15,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046854540] [2022-02-24 01:32:15,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046854540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:15,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:15,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 01:32:15,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652234033] [2022-02-24 01:32:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 01:32:15,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 01:32:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4857, Invalid=5445, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 01:32:15,524 INFO L87 Difference]: Start difference. First operand 495 states and 591 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 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 01:32:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:19,207 INFO L93 Difference]: Finished difference Result 513 states and 611 transitions. [2022-02-24 01:32:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 01:32:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 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 01:32:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:19,209 INFO L225 Difference]: With dead ends: 513 [2022-02-24 01:32:19,209 INFO L226 Difference]: Without dead ends: 507 [2022-02-24 01:32:19,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=14567, Invalid=25633, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 01:32:19,211 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1695 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:19,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 35 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-24 01:32:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 500. [2022-02-24 01:32:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.197979797979798) internal successors, (593), 495 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 597 transitions. [2022-02-24 01:32:19,554 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 597 transitions. Word has length 209 [2022-02-24 01:32:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:19,554 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 597 transitions. [2022-02-24 01:32:19,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 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 01:32:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 597 transitions. [2022-02-24 01:32:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-24 01:32:19,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:19,555 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:19,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 01:32:19,555 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 97 times [2022-02-24 01:32:19,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:19,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117904680] [2022-02-24 01:32:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:19,558 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:22,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:32:22,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:22,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117904680] [2022-02-24 01:32:22,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117904680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:22,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:22,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 01:32:22,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547499106] [2022-02-24 01:32:22,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:22,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 01:32:22,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 01:32:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4956, Invalid=5550, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:32:22,662 INFO L87 Difference]: Start difference. First operand 500 states and 597 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:27,696 INFO L93 Difference]: Finished difference Result 518 states and 617 transitions. [2022-02-24 01:32:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 01:32:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-02-24 01:32:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:27,698 INFO L225 Difference]: With dead ends: 518 [2022-02-24 01:32:27,698 INFO L226 Difference]: Without dead ends: 512 [2022-02-24 01:32:27,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14864, Invalid=26142, Unknown=0, NotChecked=0, Total=41006 [2022-02-24 01:32:27,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1639 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:27,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1639 Valid, 65 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:32:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-24 01:32:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 505. [2022-02-24 01:32:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 500 states have (on average 1.198) internal successors, (599), 500 states have internal predecessors, (599), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 603 transitions. [2022-02-24 01:32:28,070 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 603 transitions. Word has length 211 [2022-02-24 01:32:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:28,071 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 603 transitions. [2022-02-24 01:32:28,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 603 transitions. [2022-02-24 01:32:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-24 01:32:28,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:28,080 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:28,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 01:32:28,081 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash -968565361, now seen corresponding path program 98 times [2022-02-24 01:32:28,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:28,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213079877] [2022-02-24 01:32:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:28,086 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:30,779 INFO 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 01:32:30,779 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:30,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213079877] [2022-02-24 01:32:30,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213079877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:30,779 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:30,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 01:32:30,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611159474] [2022-02-24 01:32:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:30,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 01:32:30,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:30,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 01:32:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5056, Invalid=5656, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 01:32:30,783 INFO L87 Difference]: Start difference. First operand 505 states and 603 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 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 01:32:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:34,841 INFO L93 Difference]: Finished difference Result 523 states and 623 transitions. [2022-02-24 01:32:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 01:32:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 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 01:32:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:34,849 INFO L225 Difference]: With dead ends: 523 [2022-02-24 01:32:34,849 INFO L226 Difference]: Without dead ends: 517 [2022-02-24 01:32:34,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15164, Invalid=26656, Unknown=0, NotChecked=0, Total=41820 [2022-02-24 01:32:34,851 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1661 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:34,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1661 Valid, 50 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-02-24 01:32:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 510. [2022-02-24 01:32:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.198019801980198) internal successors, (605), 505 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 609 transitions. [2022-02-24 01:32:35,213 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 609 transitions. Word has length 213 [2022-02-24 01:32:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:35,213 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 609 transitions. [2022-02-24 01:32:35,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 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 01:32:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 609 transitions. [2022-02-24 01:32:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-02-24 01:32:35,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:35,214 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:35,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 01:32:35,215 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 858095498, now seen corresponding path program 99 times [2022-02-24 01:32:35,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:35,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579811857] [2022-02-24 01:32:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:35,216 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:37,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:37,062 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 01:32:37,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:37,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579811857] [2022-02-24 01:32:37,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579811857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:37,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:37,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 01:32:37,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648464670] [2022-02-24 01:32:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:37,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 01:32:37,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 01:32:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5157, Invalid=5763, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 01:32:37,065 INFO L87 Difference]: Start difference. First operand 510 states and 609 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:42,294 INFO L93 Difference]: Finished difference Result 526 states and 627 transitions. [2022-02-24 01:32:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 01:32:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-02-24 01:32:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:42,297 INFO L225 Difference]: With dead ends: 526 [2022-02-24 01:32:42,297 INFO L226 Difference]: Without dead ends: 520 [2022-02-24 01:32:42,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5447 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15467, Invalid=27175, Unknown=0, NotChecked=0, Total=42642 [2022-02-24 01:32:42,299 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1581 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:42,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1581 Valid, 55 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:32:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-24 01:32:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 515. [2022-02-24 01:32:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.1980392156862745) internal successors, (611), 510 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 615 transitions. [2022-02-24 01:32:42,663 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 615 transitions. Word has length 215 [2022-02-24 01:32:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:42,663 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 615 transitions. [2022-02-24 01:32:42,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 615 transitions. [2022-02-24 01:32:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-02-24 01:32:42,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:42,664 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 01:32:42,664 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash -362443067, now seen corresponding path program 100 times [2022-02-24 01:32:42,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:42,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186452139] [2022-02-24 01:32:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:42,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:42,666 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:32:44,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:44,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186452139] [2022-02-24 01:32:44,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [186452139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:44,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:44,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-24 01:32:44,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645488006] [2022-02-24 01:32:44,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:44,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-24 01:32:44,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-24 01:32:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5259, Invalid=5871, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 01:32:44,560 INFO L87 Difference]: Start difference. First operand 515 states and 615 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 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 01:32:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:49,028 INFO L93 Difference]: Finished difference Result 529 states and 631 transitions. [2022-02-24 01:32:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-24 01:32:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 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 01:32:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:49,029 INFO L225 Difference]: With dead ends: 529 [2022-02-24 01:32:49,029 INFO L226 Difference]: Without dead ends: 523 [2022-02-24 01:32:49,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5552 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15773, Invalid=27699, Unknown=0, NotChecked=0, Total=43472 [2022-02-24 01:32:49,032 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1599 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:49,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1599 Valid, 60 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:32:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-24 01:32:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 517. [2022-02-24 01:32:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 512 states have (on average 1.197265625) internal successors, (613), 512 states have internal predecessors, (613), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 617 transitions. [2022-02-24 01:32:49,393 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 617 transitions. Word has length 217 [2022-02-24 01:32:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 617 transitions. [2022-02-24 01:32:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 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 01:32:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 617 transitions. [2022-02-24 01:32:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-24 01:32:49,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:49,394 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:49,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 01:32:49,394 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -773932224, now seen corresponding path program 101 times [2022-02-24 01:32:49,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:49,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765351426] [2022-02-24 01:32:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:49,395 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:32:51,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:51,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765351426] [2022-02-24 01:32:51,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765351426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:51,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:51,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 01:32:51,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942078872] [2022-02-24 01:32:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 01:32:51,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 01:32:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5362, Invalid=5980, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 01:32:51,794 INFO L87 Difference]: Start difference. First operand 517 states and 617 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:32:56,815 INFO L93 Difference]: Finished difference Result 534 states and 637 transitions. [2022-02-24 01:32:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 01:32:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-02-24 01:32:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:32:56,816 INFO L225 Difference]: With dead ends: 534 [2022-02-24 01:32:56,816 INFO L226 Difference]: Without dead ends: 528 [2022-02-24 01:32:56,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5658 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16082, Invalid=28228, Unknown=0, NotChecked=0, Total=44310 [2022-02-24 01:32:56,818 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1858 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:32:56,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1858 Valid, 40 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:32:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-24 01:32:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 519. [2022-02-24 01:32:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 514 states have (on average 1.1964980544747081) internal successors, (615), 514 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 619 transitions. [2022-02-24 01:32:57,172 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 619 transitions. Word has length 219 [2022-02-24 01:32:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:32:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 619 transitions. [2022-02-24 01:32:57,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:32:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 619 transitions. [2022-02-24 01:32:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-24 01:32:57,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:32:57,173 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:32:57,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 01:32:57,173 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:32:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:32:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1078020869, now seen corresponding path program 102 times [2022-02-24 01:32:57,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:32:57,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167576906] [2022-02-24 01:32:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:32:57,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:32:57,175 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:32:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:32:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:32:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:32:59,630 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:32:59,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167576906] [2022-02-24 01:32:59,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [167576906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:32:59,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:32:59,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 01:32:59,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874134771] [2022-02-24 01:32:59,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:32:59,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 01:32:59,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:32:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 01:32:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5466, Invalid=6090, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 01:32:59,633 INFO L87 Difference]: Start difference. First operand 519 states and 619 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 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 01:33:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:04,886 INFO L93 Difference]: Finished difference Result 539 states and 643 transitions. [2022-02-24 01:33:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 01:33:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 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 01:33:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:04,890 INFO L225 Difference]: With dead ends: 539 [2022-02-24 01:33:04,890 INFO L226 Difference]: Without dead ends: 533 [2022-02-24 01:33:04,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5765 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16394, Invalid=28762, Unknown=0, NotChecked=0, Total=45156 [2022-02-24 01:33:04,892 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1613 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:04,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1613 Valid, 60 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:33:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-24 01:33:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 521. [2022-02-24 01:33:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 516 states have (on average 1.195736434108527) internal successors, (617), 516 states have internal predecessors, (617), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 621 transitions. [2022-02-24 01:33:05,248 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 621 transitions. Word has length 221 [2022-02-24 01:33:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:05,249 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 621 transitions. [2022-02-24 01:33:05,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 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 01:33:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 621 transitions. [2022-02-24 01:33:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-02-24 01:33:05,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:05,250 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:05,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 01:33:05,250 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1249432586, now seen corresponding path program 103 times [2022-02-24 01:33:05,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:05,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415160082] [2022-02-24 01:33:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:05,251 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:08,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:33:08,413 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:08,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415160082] [2022-02-24 01:33:08,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [415160082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:08,413 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:08,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 01:33:08,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25011137] [2022-02-24 01:33:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:08,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 01:33:08,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 01:33:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5571, Invalid=6201, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 01:33:08,416 INFO L87 Difference]: Start difference. First operand 521 states and 621 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:12,778 INFO L93 Difference]: Finished difference Result 544 states and 649 transitions. [2022-02-24 01:33:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 01:33:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-02-24 01:33:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:12,779 INFO L225 Difference]: With dead ends: 544 [2022-02-24 01:33:12,779 INFO L226 Difference]: Without dead ends: 538 [2022-02-24 01:33:12,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5873 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16709, Invalid=29301, Unknown=0, NotChecked=0, Total=46010 [2022-02-24 01:33:12,781 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1779 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1779 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:12,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1779 Valid, 60 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:33:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-24 01:33:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 523. [2022-02-24 01:33:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.194980694980695) internal successors, (619), 518 states have internal predecessors, (619), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 623 transitions. [2022-02-24 01:33:13,147 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 623 transitions. Word has length 223 [2022-02-24 01:33:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 623 transitions. [2022-02-24 01:33:13,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 623 transitions. [2022-02-24 01:33:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-02-24 01:33:13,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:13,148 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:13,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 01:33:13,148 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1527631921, now seen corresponding path program 104 times [2022-02-24 01:33:13,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:13,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962467789] [2022-02-24 01:33:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:13,152 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:15,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:15,124 INFO 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 01:33:15,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:15,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962467789] [2022-02-24 01:33:15,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [962467789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:15,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:15,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 01:33:15,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237488754] [2022-02-24 01:33:15,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:15,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 01:33:15,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 01:33:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5677, Invalid=6313, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 01:33:15,127 INFO L87 Difference]: Start difference. First operand 523 states and 623 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 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 01:33:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:19,919 INFO L93 Difference]: Finished difference Result 549 states and 655 transitions. [2022-02-24 01:33:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 01:33:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 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 01:33:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:19,920 INFO L225 Difference]: With dead ends: 549 [2022-02-24 01:33:19,920 INFO L226 Difference]: Without dead ends: 543 [2022-02-24 01:33:19,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5982 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17027, Invalid=29845, Unknown=0, NotChecked=0, Total=46872 [2022-02-24 01:33:19,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1711 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:19,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 45 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:33:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-02-24 01:33:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 525. [2022-02-24 01:33:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.1942307692307692) internal successors, (621), 520 states have internal predecessors, (621), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 625 transitions. [2022-02-24 01:33:20,278 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 625 transitions. Word has length 225 [2022-02-24 01:33:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:20,278 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 625 transitions. [2022-02-24 01:33:20,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 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 01:33:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 625 transitions. [2022-02-24 01:33:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-02-24 01:33:20,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:20,279 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:20,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 01:33:20,279 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1183034964, now seen corresponding path program 105 times [2022-02-24 01:33:20,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:20,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515910665] [2022-02-24 01:33:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:20,282 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:22,301 INFO 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 01:33:22,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:22,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515910665] [2022-02-24 01:33:22,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515910665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:22,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:22,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 01:33:22,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246573039] [2022-02-24 01:33:22,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:22,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 01:33:22,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 01:33:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5784, Invalid=6426, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:33:22,304 INFO L87 Difference]: Start difference. First operand 525 states and 625 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:26,930 INFO L93 Difference]: Finished difference Result 554 states and 661 transitions. [2022-02-24 01:33:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 01:33:26,931 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-02-24 01:33:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:26,931 INFO L225 Difference]: With dead ends: 554 [2022-02-24 01:33:26,932 INFO L226 Difference]: Without dead ends: 548 [2022-02-24 01:33:26,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17348, Invalid=30394, Unknown=0, NotChecked=0, Total=47742 [2022-02-24 01:33:26,934 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1674 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:26,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1674 Valid, 45 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:33:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-24 01:33:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 527. [2022-02-24 01:33:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 522 states have (on average 1.1934865900383143) internal successors, (623), 522 states have internal predecessors, (623), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 627 transitions. [2022-02-24 01:33:27,297 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 627 transitions. Word has length 227 [2022-02-24 01:33:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 627 transitions. [2022-02-24 01:33:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 627 transitions. [2022-02-24 01:33:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-24 01:33:27,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:27,298 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:27,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 01:33:27,298 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 911237223, now seen corresponding path program 106 times [2022-02-24 01:33:27,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:27,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319648089] [2022-02-24 01:33:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:27,300 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:33:29,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:29,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319648089] [2022-02-24 01:33:29,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [319648089] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:29,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:29,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 01:33:29,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95860495] [2022-02-24 01:33:29,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 01:33:29,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 01:33:29,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5892, Invalid=6540, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 01:33:29,366 INFO L87 Difference]: Start difference. First operand 527 states and 627 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 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 01:33:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:35,716 INFO L93 Difference]: Finished difference Result 559 states and 667 transitions. [2022-02-24 01:33:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-24 01:33:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 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 01:33:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:35,717 INFO L225 Difference]: With dead ends: 559 [2022-02-24 01:33:35,717 INFO L226 Difference]: Without dead ends: 553 [2022-02-24 01:33:35,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6203 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=17672, Invalid=30948, Unknown=0, NotChecked=0, Total=48620 [2022-02-24 01:33:35,720 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1886 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:35,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1886 Valid, 55 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:33:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-24 01:33:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 529. [2022-02-24 01:33:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.1927480916030535) internal successors, (625), 524 states have internal predecessors, (625), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 629 transitions. [2022-02-24 01:33:36,078 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 629 transitions. Word has length 229 [2022-02-24 01:33:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:36,079 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 629 transitions. [2022-02-24 01:33:36,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 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 01:33:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 629 transitions. [2022-02-24 01:33:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-02-24 01:33:36,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:36,080 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:36,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 01:33:36,080 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -832852894, now seen corresponding path program 107 times [2022-02-24 01:33:36,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:36,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145425703] [2022-02-24 01:33:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:36,081 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:33:38,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145425703] [2022-02-24 01:33:38,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145425703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:38,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:38,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 01:33:38,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967044245] [2022-02-24 01:33:38,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:38,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 01:33:38,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 01:33:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6001, Invalid=6655, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 01:33:38,662 INFO L87 Difference]: Start difference. First operand 529 states and 629 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:43,597 INFO L93 Difference]: Finished difference Result 564 states and 673 transitions. [2022-02-24 01:33:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 01:33:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-02-24 01:33:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:43,598 INFO L225 Difference]: With dead ends: 564 [2022-02-24 01:33:43,598 INFO L226 Difference]: Without dead ends: 558 [2022-02-24 01:33:43,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6315 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17999, Invalid=31507, Unknown=0, NotChecked=0, Total=49506 [2022-02-24 01:33:43,600 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1907 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 50 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:33:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-24 01:33:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 531. [2022-02-24 01:33:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.1920152091254752) internal successors, (627), 526 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 631 transitions. [2022-02-24 01:33:43,955 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 631 transitions. Word has length 231 [2022-02-24 01:33:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:43,955 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 631 transitions. [2022-02-24 01:33:43,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 631 transitions. [2022-02-24 01:33:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-24 01:33:43,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:43,956 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:43,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 01:33:43,956 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1866209891, now seen corresponding path program 108 times [2022-02-24 01:33:43,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:43,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642967927] [2022-02-24 01:33:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:43,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:43,957 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:33:46,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:46,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642967927] [2022-02-24 01:33:46,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642967927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:46,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:46,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 01:33:46,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716043757] [2022-02-24 01:33:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 01:33:46,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 01:33:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6111, Invalid=6771, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 01:33:46,545 INFO L87 Difference]: Start difference. First operand 531 states and 631 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 112 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 01:33:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:33:51,958 INFO L93 Difference]: Finished difference Result 569 states and 679 transitions. [2022-02-24 01:33:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 01:33:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 112 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 01:33:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:33:51,959 INFO L225 Difference]: With dead ends: 569 [2022-02-24 01:33:51,960 INFO L226 Difference]: Without dead ends: 563 [2022-02-24 01:33:51,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6428 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18329, Invalid=32071, Unknown=0, NotChecked=0, Total=50400 [2022-02-24 01:33:51,962 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1707 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:33:51,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 50 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:33:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-24 01:33:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 533. [2022-02-24 01:33:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.191287878787879) internal successors, (629), 528 states have internal predecessors, (629), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:33:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 633 transitions. [2022-02-24 01:33:52,318 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 633 transitions. Word has length 233 [2022-02-24 01:33:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:33:52,318 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 633 transitions. [2022-02-24 01:33:52,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 112 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 01:33:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 633 transitions. [2022-02-24 01:33:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-02-24 01:33:52,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:33:52,319 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:33:52,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 01:33:52,319 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:33:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:33:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1510128664, now seen corresponding path program 109 times [2022-02-24 01:33:52,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:33:52,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339442966] [2022-02-24 01:33:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:33:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:33:52,320 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:33:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:33:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:33:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:33:54,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:33:54,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339442966] [2022-02-24 01:33:54,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339442966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:33:54,449 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:33:54,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 01:33:54,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030706839] [2022-02-24 01:33:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:33:54,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 01:33:54,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:33:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 01:33:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6222, Invalid=6888, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 01:33:54,453 INFO L87 Difference]: Start difference. First operand 533 states and 633 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:00,195 INFO L93 Difference]: Finished difference Result 574 states and 685 transitions. [2022-02-24 01:34:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 01:34:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-02-24 01:34:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:00,196 INFO L225 Difference]: With dead ends: 574 [2022-02-24 01:34:00,197 INFO L226 Difference]: Without dead ends: 568 [2022-02-24 01:34:00,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6542 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=18662, Invalid=32640, Unknown=0, NotChecked=0, Total=51302 [2022-02-24 01:34:00,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1968 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:00,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1968 Valid, 55 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:34:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-02-24 01:34:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 535. [2022-02-24 01:34:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.1905660377358491) internal successors, (631), 530 states have internal predecessors, (631), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 635 transitions. [2022-02-24 01:34:00,563 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 635 transitions. Word has length 235 [2022-02-24 01:34:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:00,563 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 635 transitions. [2022-02-24 01:34:00,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 635 transitions. [2022-02-24 01:34:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-02-24 01:34:00,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:00,564 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:00,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 01:34:00,564 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -823795757, now seen corresponding path program 110 times [2022-02-24 01:34:00,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:00,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806517694] [2022-02-24 01:34:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:00,566 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:34:04,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:04,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806517694] [2022-02-24 01:34:04,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806517694] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:04,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:04,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-24 01:34:04,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266921439] [2022-02-24 01:34:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:04,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-24 01:34:04,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-24 01:34:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6334, Invalid=7006, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 01:34:04,287 INFO L87 Difference]: Start difference. First operand 535 states and 635 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 114 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 01:34:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:10,551 INFO L93 Difference]: Finished difference Result 579 states and 691 transitions. [2022-02-24 01:34:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-24 01:34:10,552 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 114 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 01:34:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:10,553 INFO L225 Difference]: With dead ends: 579 [2022-02-24 01:34:10,553 INFO L226 Difference]: Without dead ends: 573 [2022-02-24 01:34:10,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6657 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18998, Invalid=33214, Unknown=0, NotChecked=0, Total=52212 [2022-02-24 01:34:10,555 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1608 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:10,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 70 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:34:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-24 01:34:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 537. [2022-02-24 01:34:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.1898496240601504) internal successors, (633), 532 states have internal predecessors, (633), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 637 transitions. [2022-02-24 01:34:10,920 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 637 transitions. Word has length 237 [2022-02-24 01:34:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:10,920 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 637 transitions. [2022-02-24 01:34:10,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 114 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 01:34:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 637 transitions. [2022-02-24 01:34:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 01:34:10,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:10,921 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:10,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 01:34:10,921 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1752235826, now seen corresponding path program 111 times [2022-02-24 01:34:10,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:10,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920838576] [2022-02-24 01:34:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:10,922 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:34:14,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:14,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920838576] [2022-02-24 01:34:14,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920838576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:14,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:14,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 01:34:14,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490178057] [2022-02-24 01:34:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:14,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 01:34:14,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 01:34:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6447, Invalid=7125, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 01:34:14,778 INFO L87 Difference]: Start difference. First operand 537 states and 637 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:21,601 INFO L93 Difference]: Finished difference Result 584 states and 697 transitions. [2022-02-24 01:34:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 01:34:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-24 01:34:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:21,603 INFO L225 Difference]: With dead ends: 584 [2022-02-24 01:34:21,603 INFO L226 Difference]: Without dead ends: 578 [2022-02-24 01:34:21,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6773 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=19337, Invalid=33793, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 01:34:21,605 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1736 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:21,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1736 Valid, 55 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:34:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-02-24 01:34:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 539. [2022-02-24 01:34:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.1891385767790261) internal successors, (635), 534 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 639 transitions. [2022-02-24 01:34:21,972 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 639 transitions. Word has length 239 [2022-02-24 01:34:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:21,972 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 639 transitions. [2022-02-24 01:34:21,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 639 transitions. [2022-02-24 01:34:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-02-24 01:34:21,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:21,973 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:21,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 01:34:21,973 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash -629944567, now seen corresponding path program 112 times [2022-02-24 01:34:21,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:21,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863146833] [2022-02-24 01:34:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:21,974 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:24,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:34:24,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:24,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863146833] [2022-02-24 01:34:24,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863146833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:24,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:24,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-24 01:34:24,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872989727] [2022-02-24 01:34:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:24,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-24 01:34:24,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-24 01:34:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6561, Invalid=7245, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 01:34:24,539 INFO L87 Difference]: Start difference. First operand 539 states and 639 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 116 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 01:34:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:30,741 INFO L93 Difference]: Finished difference Result 589 states and 703 transitions. [2022-02-24 01:34:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-24 01:34:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 116 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 01:34:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:30,742 INFO L225 Difference]: With dead ends: 589 [2022-02-24 01:34:30,742 INFO L226 Difference]: Without dead ends: 583 [2022-02-24 01:34:30,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6890 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19679, Invalid=34377, Unknown=0, NotChecked=0, Total=54056 [2022-02-24 01:34:30,747 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1737 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:30,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 70 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:34:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-24 01:34:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 541. [2022-02-24 01:34:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 536 states have (on average 1.1884328358208955) internal successors, (637), 536 states have internal predecessors, (637), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 641 transitions. [2022-02-24 01:34:31,105 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 641 transitions. Word has length 241 [2022-02-24 01:34:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 641 transitions. [2022-02-24 01:34:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 116 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 01:34:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 641 transitions. [2022-02-24 01:34:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-02-24 01:34:31,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:31,106 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:31,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 01:34:31,106 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -144835964, now seen corresponding path program 113 times [2022-02-24 01:34:31,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:31,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607217228] [2022-02-24 01:34:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:31,108 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:33,668 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 01:34:33,668 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:33,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607217228] [2022-02-24 01:34:33,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [607217228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:33,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:33,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 01:34:33,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357112404] [2022-02-24 01:34:33,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:33,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 01:34:33,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 01:34:33,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6676, Invalid=7366, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 01:34:33,672 INFO L87 Difference]: Start difference. First operand 541 states and 641 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:40,195 INFO L93 Difference]: Finished difference Result 594 states and 709 transitions. [2022-02-24 01:34:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 01:34:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-02-24 01:34:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:40,196 INFO L225 Difference]: With dead ends: 594 [2022-02-24 01:34:40,196 INFO L226 Difference]: Without dead ends: 588 [2022-02-24 01:34:40,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7008 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20024, Invalid=34966, Unknown=0, NotChecked=0, Total=54990 [2022-02-24 01:34:40,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2026 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:40,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2026 Valid, 45 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:34:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-24 01:34:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 543. [2022-02-24 01:34:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.187732342007435) internal successors, (639), 538 states have internal predecessors, (639), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 643 transitions. [2022-02-24 01:34:40,559 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 643 transitions. Word has length 243 [2022-02-24 01:34:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:40,559 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 643 transitions. [2022-02-24 01:34:40,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 643 transitions. [2022-02-24 01:34:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-02-24 01:34:40,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:40,560 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:40,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 01:34:40,560 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2106903745, now seen corresponding path program 114 times [2022-02-24 01:34:40,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:40,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174755971] [2022-02-24 01:34:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:40,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:40,561 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:44,039 INFO 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 01:34:44,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:44,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174755971] [2022-02-24 01:34:44,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [174755971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:44,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:44,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 01:34:44,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346312602] [2022-02-24 01:34:44,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:44,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 01:34:44,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 01:34:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6792, Invalid=7488, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 01:34:44,043 INFO L87 Difference]: Start difference. First operand 543 states and 643 transitions. Second operand has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 118 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 01:34:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:34:51,500 INFO L93 Difference]: Finished difference Result 599 states and 715 transitions. [2022-02-24 01:34:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 01:34:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 118 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 01:34:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:34:51,502 INFO L225 Difference]: With dead ends: 599 [2022-02-24 01:34:51,502 INFO L226 Difference]: Without dead ends: 593 [2022-02-24 01:34:51,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20372, Invalid=35560, Unknown=0, NotChecked=0, Total=55932 [2022-02-24 01:34:51,504 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1864 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:34:51,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 55 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:34:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-24 01:34:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 545. [2022-02-24 01:34:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 540 states have (on average 1.1870370370370371) internal successors, (641), 540 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:34:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 645 transitions. [2022-02-24 01:34:51,865 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 645 transitions. Word has length 245 [2022-02-24 01:34:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:34:51,866 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 645 transitions. [2022-02-24 01:34:51,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 118 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 01:34:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 645 transitions. [2022-02-24 01:34:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-02-24 01:34:51,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:34:51,867 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:34:51,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 01:34:51,867 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:34:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:34:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2131568954, now seen corresponding path program 115 times [2022-02-24 01:34:51,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:34:51,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223009163] [2022-02-24 01:34:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:34:51,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:34:51,868 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:34:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:54,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:34:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:34:54,323 INFO 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 01:34:54,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:34:54,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223009163] [2022-02-24 01:34:54,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [223009163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:34:54,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:34:54,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-24 01:34:54,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530066781] [2022-02-24 01:34:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:34:54,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-24 01:34:54,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:34:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-24 01:34:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6909, Invalid=7611, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 01:34:54,339 INFO L87 Difference]: Start difference. First operand 545 states and 645 transitions. Second operand has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:00,564 INFO L93 Difference]: Finished difference Result 604 states and 721 transitions. [2022-02-24 01:35:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-24 01:35:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-02-24 01:35:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:00,565 INFO L225 Difference]: With dead ends: 604 [2022-02-24 01:35:00,565 INFO L226 Difference]: Without dead ends: 598 [2022-02-24 01:35:00,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7247 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=20723, Invalid=36159, Unknown=0, NotChecked=0, Total=56882 [2022-02-24 01:35:00,568 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2008 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:00,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 55 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:35:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-24 01:35:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 547. [2022-02-24 01:35:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 542 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 647 transitions. [2022-02-24 01:35:00,925 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 647 transitions. Word has length 247 [2022-02-24 01:35:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:00,925 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 647 transitions. [2022-02-24 01:35:00,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 647 transitions. [2022-02-24 01:35:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-24 01:35:00,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:00,926 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:00,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 01:35:00,926 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash -620131211, now seen corresponding path program 116 times [2022-02-24 01:35:00,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:00,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699958142] [2022-02-24 01:35:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:00,927 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:04,899 INFO 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 01:35:04,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:04,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699958142] [2022-02-24 01:35:04,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699958142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:04,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:04,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-24 01:35:04,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115438105] [2022-02-24 01:35:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-24 01:35:04,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-24 01:35:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7027, Invalid=7735, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 01:35:04,903 INFO L87 Difference]: Start difference. First operand 547 states and 647 transitions. Second operand has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 120 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 01:35:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:11,624 INFO L93 Difference]: Finished difference Result 609 states and 727 transitions. [2022-02-24 01:35:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-24 01:35:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 120 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 01:35:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:11,625 INFO L225 Difference]: With dead ends: 609 [2022-02-24 01:35:11,625 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 01:35:11,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7368 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21077, Invalid=36763, Unknown=0, NotChecked=0, Total=57840 [2022-02-24 01:35:11,628 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1763 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:11,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 45 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:35:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 01:35:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 549. [2022-02-24 01:35:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 544 states have (on average 1.1856617647058822) internal successors, (645), 544 states have internal predecessors, (645), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 649 transitions. [2022-02-24 01:35:11,987 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 649 transitions. Word has length 249 [2022-02-24 01:35:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:11,988 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 649 transitions. [2022-02-24 01:35:11,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 120 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 01:35:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 649 transitions. [2022-02-24 01:35:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-02-24 01:35:11,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:11,989 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 01:35:11,989 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 695864560, now seen corresponding path program 117 times [2022-02-24 01:35:11,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:11,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982985044] [2022-02-24 01:35:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:11,990 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:14,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:14,497 INFO 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 01:35:14,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:14,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982985044] [2022-02-24 01:35:14,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982985044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:14,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:14,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 01:35:14,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855607915] [2022-02-24 01:35:14,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:14,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 01:35:14,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 01:35:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7146, Invalid=7860, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 01:35:14,499 INFO L87 Difference]: Start difference. First operand 549 states and 649 transitions. Second operand has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:20,808 INFO L93 Difference]: Finished difference Result 614 states and 733 transitions. [2022-02-24 01:35:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 01:35:20,808 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-02-24 01:35:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:20,809 INFO L225 Difference]: With dead ends: 614 [2022-02-24 01:35:20,809 INFO L226 Difference]: Without dead ends: 608 [2022-02-24 01:35:20,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7490 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=21434, Invalid=37372, Unknown=0, NotChecked=0, Total=58806 [2022-02-24 01:35:20,812 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1745 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:20,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1745 Valid, 55 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:35:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-02-24 01:35:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 551. [2022-02-24 01:35:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 546 states have (on average 1.184981684981685) internal successors, (647), 546 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 651 transitions. [2022-02-24 01:35:21,173 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 651 transitions. Word has length 251 [2022-02-24 01:35:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:21,173 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 651 transitions. [2022-02-24 01:35:21,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 651 transitions. [2022-02-24 01:35:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-02-24 01:35:21,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:21,174 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:21,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 01:35:21,174 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1647551829, now seen corresponding path program 118 times [2022-02-24 01:35:21,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:21,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642880885] [2022-02-24 01:35:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:21,175 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:24,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:24,273 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 01:35:24,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:24,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642880885] [2022-02-24 01:35:24,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642880885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:24,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:24,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-24 01:35:24,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727897330] [2022-02-24 01:35:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:24,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-24 01:35:24,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-24 01:35:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7266, Invalid=7986, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 01:35:24,277 INFO L87 Difference]: Start difference. First operand 551 states and 651 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 122 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 01:35:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:31,956 INFO L93 Difference]: Finished difference Result 619 states and 739 transitions. [2022-02-24 01:35:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-24 01:35:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 122 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 01:35:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:31,957 INFO L225 Difference]: With dead ends: 619 [2022-02-24 01:35:31,957 INFO L226 Difference]: Without dead ends: 613 [2022-02-24 01:35:31,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7613 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=21794, Invalid=37986, Unknown=0, NotChecked=0, Total=59780 [2022-02-24 01:35:31,960 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1979 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:31,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 70 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:35:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-24 01:35:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 553. [2022-02-24 01:35:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 548 states have (on average 1.1843065693430657) internal successors, (649), 548 states have internal predecessors, (649), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 653 transitions. [2022-02-24 01:35:32,312 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 653 transitions. Word has length 253 [2022-02-24 01:35:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:32,312 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 653 transitions. [2022-02-24 01:35:32,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 122 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 01:35:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 653 transitions. [2022-02-24 01:35:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-02-24 01:35:32,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:32,313 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:32,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 01:35:32,313 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1187128742, now seen corresponding path program 119 times [2022-02-24 01:35:32,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:32,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382075452] [2022-02-24 01:35:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:32,315 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:35:36,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:36,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382075452] [2022-02-24 01:35:36,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382075452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:36,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:36,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-24 01:35:36,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750971380] [2022-02-24 01:35:36,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:36,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-24 01:35:36,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-24 01:35:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7387, Invalid=8113, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 01:35:36,033 INFO L87 Difference]: Start difference. First operand 553 states and 653 transitions. Second operand has 125 states, 125 states have (on average 2.008) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:43,591 INFO L93 Difference]: Finished difference Result 624 states and 745 transitions. [2022-02-24 01:35:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-24 01:35:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-02-24 01:35:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:43,592 INFO L225 Difference]: With dead ends: 624 [2022-02-24 01:35:43,592 INFO L226 Difference]: Without dead ends: 618 [2022-02-24 01:35:43,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7737 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=22157, Invalid=38605, Unknown=0, NotChecked=0, Total=60762 [2022-02-24 01:35:43,594 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2080 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:43,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 50 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:35:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-02-24 01:35:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 555. [2022-02-24 01:35:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1836363636363636) internal successors, (651), 550 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 655 transitions. [2022-02-24 01:35:43,946 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 655 transitions. Word has length 255 [2022-02-24 01:35:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:43,946 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 655 transitions. [2022-02-24 01:35:43,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 655 transitions. [2022-02-24 01:35:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-02-24 01:35:43,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:43,947 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:43,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 01:35:43,948 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1989075487, now seen corresponding path program 120 times [2022-02-24 01:35:43,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:43,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408694498] [2022-02-24 01:35:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:43,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:43,949 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:35:47,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:47,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408694498] [2022-02-24 01:35:47,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408694498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:47,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:47,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 01:35:47,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575322491] [2022-02-24 01:35:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 01:35:47,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 01:35:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7509, Invalid=8241, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 01:35:47,718 INFO L87 Difference]: Start difference. First operand 555 states and 655 transitions. Second operand has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 124 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 01:35:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:35:54,839 INFO L93 Difference]: Finished difference Result 629 states and 751 transitions. [2022-02-24 01:35:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 01:35:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 124 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 01:35:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:35:54,841 INFO L225 Difference]: With dead ends: 629 [2022-02-24 01:35:54,841 INFO L226 Difference]: Without dead ends: 623 [2022-02-24 01:35:54,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7862 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=22523, Invalid=39229, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 01:35:54,843 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2029 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:35:54,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2029 Valid, 55 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:35:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-24 01:35:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 557. [2022-02-24 01:35:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 552 states have (on average 1.1829710144927537) internal successors, (653), 552 states have internal predecessors, (653), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:35:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 657 transitions. [2022-02-24 01:35:55,198 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 657 transitions. Word has length 257 [2022-02-24 01:35:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:35:55,199 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 657 transitions. [2022-02-24 01:35:55,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 124 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 01:35:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 657 transitions. [2022-02-24 01:35:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-24 01:35:55,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:35:55,200 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:35:55,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 01:35:55,200 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:35:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:35:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -599592100, now seen corresponding path program 121 times [2022-02-24 01:35:55,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:35:55,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013143489] [2022-02-24 01:35:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:35:55,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:35:55,201 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:35:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:35:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:35:58,011 INFO 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 01:35:58,011 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:35:58,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013143489] [2022-02-24 01:35:58,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013143489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:35:58,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:35:58,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-24 01:35:58,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937426612] [2022-02-24 01:35:58,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:35:58,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-24 01:35:58,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:35:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-24 01:35:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7632, Invalid=8370, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 01:35:58,015 INFO L87 Difference]: Start difference. First operand 557 states and 657 transitions. Second operand has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:36:05,535 INFO L93 Difference]: Finished difference Result 634 states and 757 transitions. [2022-02-24 01:36:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-24 01:36:05,535 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-02-24 01:36:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:36:05,536 INFO L225 Difference]: With dead ends: 634 [2022-02-24 01:36:05,536 INFO L226 Difference]: Without dead ends: 628 [2022-02-24 01:36:05,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7988 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22892, Invalid=39858, Unknown=0, NotChecked=0, Total=62750 [2022-02-24 01:36:05,539 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1982 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:36:05,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1982 Valid, 50 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:36:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-24 01:36:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 559. [2022-02-24 01:36:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.1823104693140793) internal successors, (655), 554 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 659 transitions. [2022-02-24 01:36:05,907 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 659 transitions. Word has length 259 [2022-02-24 01:36:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:36:05,907 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 659 transitions. [2022-02-24 01:36:05,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 659 transitions. [2022-02-24 01:36:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-02-24 01:36:05,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:36:05,908 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:36:05,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 01:36:05,908 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:36:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:36:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1040886249, now seen corresponding path program 122 times [2022-02-24 01:36:05,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:36:05,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078910124] [2022-02-24 01:36:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:36:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:36:05,909 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:36:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:10,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:36:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:36:10,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:36:10,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078910124] [2022-02-24 01:36:10,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078910124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:36:10,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:36:10,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-24 01:36:10,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588763739] [2022-02-24 01:36:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:36:10,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-24 01:36:10,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:36:10,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-24 01:36:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7756, Invalid=8500, Unknown=0, NotChecked=0, Total=16256 [2022-02-24 01:36:10,138 INFO L87 Difference]: Start difference. First operand 559 states and 659 transitions. Second operand has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 126 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 01:36:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:36:17,946 INFO L93 Difference]: Finished difference Result 639 states and 763 transitions. [2022-02-24 01:36:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-24 01:36:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 126 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 01:36:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:36:17,947 INFO L225 Difference]: With dead ends: 639 [2022-02-24 01:36:17,947 INFO L226 Difference]: Without dead ends: 633 [2022-02-24 01:36:17,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8115 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=23264, Invalid=40492, Unknown=0, NotChecked=0, Total=63756 [2022-02-24 01:36:17,950 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2341 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:36:17,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 40 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:36:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-24 01:36:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 561. [2022-02-24 01:36:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.1816546762589928) internal successors, (657), 556 states have internal predecessors, (657), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 661 transitions. [2022-02-24 01:36:18,312 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 661 transitions. Word has length 261 [2022-02-24 01:36:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:36:18,312 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 661 transitions. [2022-02-24 01:36:18,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 126 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 01:36:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 661 transitions. [2022-02-24 01:36:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-24 01:36:18,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:36:18,313 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:36:18,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 01:36:18,314 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:36:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:36:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash 77198866, now seen corresponding path program 123 times [2022-02-24 01:36:18,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:36:18,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560079984] [2022-02-24 01:36:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:36:18,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:36:18,315 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:36:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:21,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:36:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:21,206 INFO 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 01:36:21,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:36:21,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560079984] [2022-02-24 01:36:21,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560079984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:36:21,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:36:21,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 01:36:21,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554450487] [2022-02-24 01:36:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:36:21,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 01:36:21,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:36:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 01:36:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7881, Invalid=8631, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 01:36:21,209 INFO L87 Difference]: Start difference. First operand 561 states and 661 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:36:27,949 INFO L93 Difference]: Finished difference Result 644 states and 769 transitions. [2022-02-24 01:36:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 01:36:27,949 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-02-24 01:36:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:36:27,950 INFO L225 Difference]: With dead ends: 644 [2022-02-24 01:36:27,950 INFO L226 Difference]: Without dead ends: 638 [2022-02-24 01:36:27,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=23639, Invalid=41131, Unknown=0, NotChecked=0, Total=64770 [2022-02-24 01:36:27,953 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2164 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:36:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2164 Valid, 40 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:36:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-24 01:36:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 563. [2022-02-24 01:36:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.1810035842293907) internal successors, (659), 558 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 663 transitions. [2022-02-24 01:36:28,306 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 663 transitions. Word has length 263 [2022-02-24 01:36:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:36:28,306 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 663 transitions. [2022-02-24 01:36:28,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 663 transitions. [2022-02-24 01:36:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-24 01:36:28,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:36:28,307 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:36:28,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 01:36:28,307 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:36:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:36:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash 815170381, now seen corresponding path program 124 times [2022-02-24 01:36:28,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:36:28,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152835665] [2022-02-24 01:36:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:36:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:36:28,316 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:36:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:36:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:36:32,938 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:36:32,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152835665] [2022-02-24 01:36:32,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [152835665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:36:32,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:36:32,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-24 01:36:32,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606996304] [2022-02-24 01:36:32,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:36:32,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-24 01:36:32,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:36:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-24 01:36:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8007, Invalid=8763, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 01:36:32,943 INFO L87 Difference]: Start difference. First operand 563 states and 663 transitions. Second operand has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 128 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 01:36:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:36:40,581 INFO L93 Difference]: Finished difference Result 649 states and 775 transitions. [2022-02-24 01:36:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-24 01:36:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 128 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 01:36:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:36:40,583 INFO L225 Difference]: With dead ends: 649 [2022-02-24 01:36:40,583 INFO L226 Difference]: Without dead ends: 643 [2022-02-24 01:36:40,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=24017, Invalid=41775, Unknown=0, NotChecked=0, Total=65792 [2022-02-24 01:36:40,586 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1899 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:36:40,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1899 Valid, 60 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:36:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-24 01:36:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 565. [2022-02-24 01:36:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 560 states have (on average 1.1803571428571429) internal successors, (661), 560 states have internal predecessors, (661), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 665 transitions. [2022-02-24 01:36:40,954 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 665 transitions. Word has length 265 [2022-02-24 01:36:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:36:40,954 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 665 transitions. [2022-02-24 01:36:40,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 128 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 01:36:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 665 transitions. [2022-02-24 01:36:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-02-24 01:36:40,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:36:40,956 INFO L514 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:36:40,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 01:36:40,956 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:36:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:36:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1336192456, now seen corresponding path program 125 times [2022-02-24 01:36:40,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:36:40,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686676835] [2022-02-24 01:36:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:36:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:36:40,958 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:36:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:36:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:36:43,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:36:43,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686676835] [2022-02-24 01:36:43,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686676835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:36:43,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:36:43,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-24 01:36:43,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047781354] [2022-02-24 01:36:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:36:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-24 01:36:43,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:36:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-24 01:36:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8134, Invalid=8896, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 01:36:43,983 INFO L87 Difference]: Start difference. First operand 565 states and 665 transitions. Second operand has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:36:52,172 INFO L93 Difference]: Finished difference Result 654 states and 781 transitions. [2022-02-24 01:36:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-24 01:36:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-02-24 01:36:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:36:52,174 INFO L225 Difference]: With dead ends: 654 [2022-02-24 01:36:52,174 INFO L226 Difference]: Without dead ends: 648 [2022-02-24 01:36:52,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8502 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=24398, Invalid=42424, Unknown=0, NotChecked=0, Total=66822 [2022-02-24 01:36:52,176 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1992 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:36:52,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 50 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:36:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-24 01:36:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 567. [2022-02-24 01:36:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 562 states have (on average 1.1797153024911031) internal successors, (663), 562 states have internal predecessors, (663), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 667 transitions. [2022-02-24 01:36:52,542 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 667 transitions. Word has length 267 [2022-02-24 01:36:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:36:52,543 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 667 transitions. [2022-02-24 01:36:52,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:36:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 667 transitions. [2022-02-24 01:36:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-24 01:36:52,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:36:52,544 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:36:52,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 01:36:52,544 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:36:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:36:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash -472767101, now seen corresponding path program 126 times [2022-02-24 01:36:52,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:36:52,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338398011] [2022-02-24 01:36:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:36:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:36:52,546 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:36:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:55,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:36:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:36:55,438 INFO 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 01:36:55,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:36:55,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338398011] [2022-02-24 01:36:55,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338398011] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:36:55,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:36:55,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 01:36:55,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552531500] [2022-02-24 01:36:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:36:55,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 01:36:55,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:36:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 01:36:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8262, Invalid=9030, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 01:36:55,443 INFO L87 Difference]: Start difference. First operand 567 states and 667 transitions. Second operand has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 130 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 01:37:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:03,137 INFO L93 Difference]: Finished difference Result 659 states and 787 transitions. [2022-02-24 01:37:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 01:37:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 130 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 01:37:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:03,139 INFO L225 Difference]: With dead ends: 659 [2022-02-24 01:37:03,139 INFO L226 Difference]: Without dead ends: 653 [2022-02-24 01:37:03,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8633 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=24782, Invalid=43078, Unknown=0, NotChecked=0, Total=67860 [2022-02-24 01:37:03,142 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2073 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:03,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 50 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:37:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-24 01:37:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 569. [2022-02-24 01:37:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 564 states have (on average 1.179078014184397) internal successors, (665), 564 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 669 transitions. [2022-02-24 01:37:03,512 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 669 transitions. Word has length 269 [2022-02-24 01:37:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:03,513 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 669 transitions. [2022-02-24 01:37:03,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 130 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 01:37:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 669 transitions. [2022-02-24 01:37:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-02-24 01:37:03,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:03,514 INFO L514 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:03,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 01:37:03,515 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash 578853502, now seen corresponding path program 127 times [2022-02-24 01:37:03,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:03,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206258754] [2022-02-24 01:37:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:03,516 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:07,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:07,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:07,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206258754] [2022-02-24 01:37:07,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206258754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:07,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:07,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-02-24 01:37:07,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648086259] [2022-02-24 01:37:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:07,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-02-24 01:37:07,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-02-24 01:37:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8391, Invalid=9165, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 01:37:07,300 INFO L87 Difference]: Start difference. First operand 569 states and 669 transitions. Second operand has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:16,103 INFO L93 Difference]: Finished difference Result 664 states and 793 transitions. [2022-02-24 01:37:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-24 01:37:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-02-24 01:37:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:16,106 INFO L225 Difference]: With dead ends: 664 [2022-02-24 01:37:16,106 INFO L226 Difference]: Without dead ends: 658 [2022-02-24 01:37:16,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8765 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=25169, Invalid=43737, Unknown=0, NotChecked=0, Total=68906 [2022-02-24 01:37:16,109 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2489 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:16,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2489 Valid, 35 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:37:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-02-24 01:37:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 571. [2022-02-24 01:37:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 566 states have (on average 1.1784452296819787) internal successors, (667), 566 states have internal predecessors, (667), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 671 transitions. [2022-02-24 01:37:16,477 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 671 transitions. Word has length 271 [2022-02-24 01:37:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:16,478 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 671 transitions. [2022-02-24 01:37:16,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 671 transitions. [2022-02-24 01:37:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-02-24 01:37:16,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:16,479 INFO L514 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 01:37:16,479 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1868938425, now seen corresponding path program 128 times [2022-02-24 01:37:16,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:16,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188588564] [2022-02-24 01:37:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:16,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:16,480 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:20,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:20,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188588564] [2022-02-24 01:37:20,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188588564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:20,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:20,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 01:37:20,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749322525] [2022-02-24 01:37:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:20,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 01:37:20,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 01:37:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8521, Invalid=9301, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 01:37:20,416 INFO L87 Difference]: Start difference. First operand 571 states and 671 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 132 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 01:37:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:29,268 INFO L93 Difference]: Finished difference Result 669 states and 799 transitions. [2022-02-24 01:37:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 01:37:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 132 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 01:37:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:29,269 INFO L225 Difference]: With dead ends: 669 [2022-02-24 01:37:29,270 INFO L226 Difference]: Without dead ends: 663 [2022-02-24 01:37:29,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8898 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25559, Invalid=44401, Unknown=0, NotChecked=0, Total=69960 [2022-02-24 01:37:29,272 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1940 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:29,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1940 Valid, 65 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:37:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-24 01:37:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 573. [2022-02-24 01:37:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 568 states have (on average 1.1778169014084507) internal successors, (669), 568 states have internal predecessors, (669), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 673 transitions. [2022-02-24 01:37:29,638 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 673 transitions. Word has length 273 [2022-02-24 01:37:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:29,638 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 673 transitions. [2022-02-24 01:37:29,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 132 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 01:37:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 673 transitions. [2022-02-24 01:37:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-24 01:37:29,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:29,639 INFO L514 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:29,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 01:37:29,639 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 395000884, now seen corresponding path program 129 times [2022-02-24 01:37:29,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:29,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103915170] [2022-02-24 01:37:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:29,641 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:32,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:32,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:32,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103915170] [2022-02-24 01:37:32,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103915170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:32,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:32,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 01:37:32,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930527468] [2022-02-24 01:37:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:32,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 01:37:32,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 01:37:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8652, Invalid=9438, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 01:37:32,640 INFO L87 Difference]: Start difference. First operand 573 states and 673 transitions. Second operand has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:41,523 INFO L93 Difference]: Finished difference Result 674 states and 805 transitions. [2022-02-24 01:37:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 01:37:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-02-24 01:37:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:41,539 INFO L225 Difference]: With dead ends: 674 [2022-02-24 01:37:41,539 INFO L226 Difference]: Without dead ends: 668 [2022-02-24 01:37:41,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9032 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=25952, Invalid=45070, Unknown=0, NotChecked=0, Total=71022 [2022-02-24 01:37:41,542 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1882 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:41,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 70 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:37:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-24 01:37:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 575. [2022-02-24 01:37:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.1771929824561405) internal successors, (671), 570 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 675 transitions. [2022-02-24 01:37:41,981 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 675 transitions. Word has length 275 [2022-02-24 01:37:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:41,981 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 675 transitions. [2022-02-24 01:37:41,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 675 transitions. [2022-02-24 01:37:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-24 01:37:41,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:41,982 INFO L514 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:41,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 01:37:41,982 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1280231663, now seen corresponding path program 130 times [2022-02-24 01:37:41,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:41,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897032643] [2022-02-24 01:37:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:41,983 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:46,430 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 01:37:46,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:46,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897032643] [2022-02-24 01:37:46,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897032643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:46,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:46,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-24 01:37:46,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753020382] [2022-02-24 01:37:46,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-24 01:37:46,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-24 01:37:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8784, Invalid=9576, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 01:37:46,435 INFO L87 Difference]: Start difference. First operand 575 states and 675 transitions. Second operand has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 134 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 01:37:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:55,312 INFO L93 Difference]: Finished difference Result 679 states and 811 transitions. [2022-02-24 01:37:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 01:37:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 134 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 01:37:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:55,314 INFO L225 Difference]: With dead ends: 679 [2022-02-24 01:37:55,314 INFO L226 Difference]: Without dead ends: 673 [2022-02-24 01:37:55,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9167 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=26348, Invalid=45744, Unknown=0, NotChecked=0, Total=72092 [2022-02-24 01:37:55,316 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2102 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:55,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2102 Valid, 55 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:37:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-24 01:37:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 577. [2022-02-24 01:37:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 572 states have (on average 1.1765734265734267) internal successors, (673), 572 states have internal predecessors, (673), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 677 transitions. [2022-02-24 01:37:55,685 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 677 transitions. Word has length 277 [2022-02-24 01:37:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 677 transitions. [2022-02-24 01:37:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 134 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 01:37:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 677 transitions. [2022-02-24 01:37:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-02-24 01:37:55,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:55,686 INFO L514 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:55,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-24 01:37:55,686 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1583485674, now seen corresponding path program 131 times [2022-02-24 01:37:55,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:55,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319974292] [2022-02-24 01:37:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:55,688 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:01,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:01,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319974292] [2022-02-24 01:38:01,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319974292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:01,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:01,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-24 01:38:01,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305121908] [2022-02-24 01:38:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:01,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-24 01:38:01,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-24 01:38:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8917, Invalid=9715, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 01:38:01,011 INFO L87 Difference]: Start difference. First operand 577 states and 677 transitions. Second operand has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:10,421 INFO L93 Difference]: Finished difference Result 684 states and 817 transitions. [2022-02-24 01:38:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-24 01:38:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-02-24 01:38:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:10,422 INFO L225 Difference]: With dead ends: 684 [2022-02-24 01:38:10,422 INFO L226 Difference]: Without dead ends: 678 [2022-02-24 01:38:10,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9303 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26747, Invalid=46423, Unknown=0, NotChecked=0, Total=73170 [2022-02-24 01:38:10,426 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2275 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:10,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 55 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:38:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-24 01:38:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 579. [2022-02-24 01:38:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 574 states have (on average 1.17595818815331) internal successors, (675), 574 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 679 transitions. [2022-02-24 01:38:10,821 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 679 transitions. Word has length 279 [2022-02-24 01:38:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:10,821 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 679 transitions. [2022-02-24 01:38:10,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 679 transitions. [2022-02-24 01:38:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-02-24 01:38:10,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:10,822 INFO L514 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:10,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-24 01:38:10,822 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 952814117, now seen corresponding path program 132 times [2022-02-24 01:38:10,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:10,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214288276] [2022-02-24 01:38:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:10,824 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:38:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,254 INFO 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 01:38:16,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:16,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214288276] [2022-02-24 01:38:16,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [214288276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:16,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:16,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 01:38:16,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139932000] [2022-02-24 01:38:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:16,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 01:38:16,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 01:38:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9051, Invalid=9855, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 01:38:16,257 INFO L87 Difference]: Start difference. First operand 579 states and 679 transitions. Second operand has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 136 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 01:38:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:26,513 INFO L93 Difference]: Finished difference Result 689 states and 823 transitions. [2022-02-24 01:38:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 01:38:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 136 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 01:38:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:26,515 INFO L225 Difference]: With dead ends: 689 [2022-02-24 01:38:26,515 INFO L226 Difference]: Without dead ends: 683 [2022-02-24 01:38:26,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9440 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=27149, Invalid=47107, Unknown=0, NotChecked=0, Total=74256 [2022-02-24 01:38:26,518 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2393 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:26,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 40 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:38:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-02-24 01:38:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 581. [2022-02-24 01:38:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 1.1753472222222223) internal successors, (677), 576 states have internal predecessors, (677), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 681 transitions. [2022-02-24 01:38:26,883 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 681 transitions. Word has length 281 [2022-02-24 01:38:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:26,884 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 681 transitions. [2022-02-24 01:38:26,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 136 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 01:38:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 681 transitions. [2022-02-24 01:38:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-02-24 01:38:26,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:26,885 INFO L514 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-24 01:38:26,885 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash 467836576, now seen corresponding path program 133 times [2022-02-24 01:38:26,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:26,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600637239] [2022-02-24 01:38:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:26,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:26,886 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:38:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:31,729 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:31,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600637239] [2022-02-24 01:38:31,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600637239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:31,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:31,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-02-24 01:38:31,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537194855] [2022-02-24 01:38:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-02-24 01:38:31,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-02-24 01:38:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9186, Invalid=9996, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 01:38:31,732 INFO L87 Difference]: Start difference. First operand 581 states and 681 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:42,332 INFO L93 Difference]: Finished difference Result 694 states and 829 transitions. [2022-02-24 01:38:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-24 01:38:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-02-24 01:38:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:42,333 INFO L225 Difference]: With dead ends: 694 [2022-02-24 01:38:42,333 INFO L226 Difference]: Without dead ends: 688 [2022-02-24 01:38:42,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=27554, Invalid=47796, Unknown=0, NotChecked=0, Total=75350 [2022-02-24 01:38:42,336 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2128 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:42,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2128 Valid, 55 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:38:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-24 01:38:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 583. [2022-02-24 01:38:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 578 states have (on average 1.1747404844290656) internal successors, (679), 578 states have internal predecessors, (679), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 683 transitions. [2022-02-24 01:38:42,707 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 683 transitions. Word has length 283 [2022-02-24 01:38:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:42,708 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 683 transitions. [2022-02-24 01:38:42,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 683 transitions. [2022-02-24 01:38:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-02-24 01:38:42,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:42,709 INFO L514 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:42,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-24 01:38:42,709 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1739112357, now seen corresponding path program 134 times [2022-02-24 01:38:42,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:42,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605901435] [2022-02-24 01:38:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:42,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:42,710 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:38:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:46,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:46,193 INFO 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 01:38:46,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:46,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605901435] [2022-02-24 01:38:46,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605901435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:46,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:46,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-24 01:38:46,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815458287] [2022-02-24 01:38:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:46,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-24 01:38:46,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-24 01:38:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9322, Invalid=10138, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 01:38:46,197 INFO L87 Difference]: Start difference. First operand 583 states and 683 transitions. Second operand has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 138 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 01:38:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:56,336 INFO L93 Difference]: Finished difference Result 699 states and 835 transitions. [2022-02-24 01:38:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 01:38:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 138 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 01:38:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:56,351 INFO L225 Difference]: With dead ends: 699 [2022-02-24 01:38:56,351 INFO L226 Difference]: Without dead ends: 693 [2022-02-24 01:38:56,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=27962, Invalid=48490, Unknown=0, NotChecked=0, Total=76452 [2022-02-24 01:38:56,355 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1896 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:56,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 55 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:38:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-24 01:38:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 585. [2022-02-24 01:38:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 580 states have (on average 1.1741379310344828) internal successors, (681), 580 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 685 transitions. [2022-02-24 01:38:56,740 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 685 transitions. Word has length 285 [2022-02-24 01:38:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:56,741 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 685 transitions. [2022-02-24 01:38:56,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 138 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 01:38:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 685 transitions. [2022-02-24 01:38:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-02-24 01:38:56,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:56,742 INFO L514 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:56,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-24 01:38:56,742 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -903192746, now seen corresponding path program 135 times [2022-02-24 01:38:56,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:56,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575715976] [2022-02-24 01:38:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:56,743 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:38:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,277 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 01:39:02,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575715976] [2022-02-24 01:39:02,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [575715976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:02,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:02,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-02-24 01:39:02,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155144316] [2022-02-24 01:39:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-24 01:39:02,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-24 01:39:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9459, Invalid=10281, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 01:39:02,282 INFO L87 Difference]: Start difference. First operand 585 states and 685 transitions. Second operand has 141 states, 141 states have (on average 2.00709219858156) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:12,284 INFO L93 Difference]: Finished difference Result 704 states and 841 transitions. [2022-02-24 01:39:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-24 01:39:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.00709219858156) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-02-24 01:39:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:12,300 INFO L225 Difference]: With dead ends: 704 [2022-02-24 01:39:12,300 INFO L226 Difference]: Without dead ends: 698 [2022-02-24 01:39:12,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9857 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=28373, Invalid=49189, Unknown=0, NotChecked=0, Total=77562 [2022-02-24 01:39:12,303 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2188 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2188 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:12,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2188 Valid, 60 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:39:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-24 01:39:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 587. [2022-02-24 01:39:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.1735395189003437) internal successors, (683), 582 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 687 transitions. [2022-02-24 01:39:12,708 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 687 transitions. Word has length 287 [2022-02-24 01:39:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:12,708 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 687 transitions. [2022-02-24 01:39:12,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.00709219858156) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 687 transitions. [2022-02-24 01:39:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-24 01:39:12,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:12,709 INFO L514 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:12,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-24 01:39:12,709 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -743330927, now seen corresponding path program 136 times [2022-02-24 01:39:12,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:12,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075315426] [2022-02-24 01:39:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:12,710 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:39:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:17,407 INFO 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 01:39:17,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:17,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075315426] [2022-02-24 01:39:17,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075315426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:17,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:17,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-24 01:39:17,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212701416] [2022-02-24 01:39:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:17,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-24 01:39:17,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-24 01:39:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9597, Invalid=10425, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 01:39:17,409 INFO L87 Difference]: Start difference. First operand 587 states and 687 transitions. Second operand has 142 states, 142 states have (on average 2.007042253521127) internal successors, (285), 140 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 01:39:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:27,368 INFO L93 Difference]: Finished difference Result 709 states and 847 transitions. [2022-02-24 01:39:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-02-24 01:39:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.007042253521127) internal successors, (285), 140 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 01:39:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:27,369 INFO L225 Difference]: With dead ends: 709 [2022-02-24 01:39:27,369 INFO L226 Difference]: Without dead ends: 703 [2022-02-24 01:39:27,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9998 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=28787, Invalid=49893, Unknown=0, NotChecked=0, Total=78680 [2022-02-24 01:39:27,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2209 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2209 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:27,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2209 Valid, 55 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:39:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-24 01:39:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 589. [2022-02-24 01:39:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 584 states have (on average 1.172945205479452) internal successors, (685), 584 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 689 transitions. [2022-02-24 01:39:27,742 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 689 transitions. Word has length 289 [2022-02-24 01:39:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:27,742 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 689 transitions. [2022-02-24 01:39:27,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.007042253521127) internal successors, (285), 140 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 01:39:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 689 transitions. [2022-02-24 01:39:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-02-24 01:39:27,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:27,743 INFO L514 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-24 01:39:27,743 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1734945524, now seen corresponding path program 137 times [2022-02-24 01:39:27,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:27,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765086659] [2022-02-24 01:39:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:27,745 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:39:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:33,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:33,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765086659] [2022-02-24 01:39:33,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [765086659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:33,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:33,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-24 01:39:33,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879242930] [2022-02-24 01:39:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:33,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-24 01:39:33,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-24 01:39:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9736, Invalid=10570, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 01:39:33,176 INFO L87 Difference]: Start difference. First operand 589 states and 689 transitions. Second operand has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:43,909 INFO L93 Difference]: Finished difference Result 714 states and 853 transitions. [2022-02-24 01:39:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-24 01:39:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-02-24 01:39:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:43,911 INFO L225 Difference]: With dead ends: 714 [2022-02-24 01:39:43,911 INFO L226 Difference]: Without dead ends: 708 [2022-02-24 01:39:43,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10140 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=29204, Invalid=50602, Unknown=0, NotChecked=0, Total=79806 [2022-02-24 01:39:43,913 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2369 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:43,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 55 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:39:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-24 01:39:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 591. [2022-02-24 01:39:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 586 states have (on average 1.1723549488054608) internal successors, (687), 586 states have internal predecessors, (687), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 691 transitions. [2022-02-24 01:39:44,288 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 691 transitions. Word has length 291 [2022-02-24 01:39:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:44,288 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 691 transitions. [2022-02-24 01:39:44,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 141 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 691 transitions. [2022-02-24 01:39:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-24 01:39:44,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:44,289 INFO L514 BasicCegarLoop]: trace histogram [139, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:44,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-24 01:39:44,289 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1193833529, now seen corresponding path program 138 times [2022-02-24 01:39:44,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:44,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142648927] [2022-02-24 01:39:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:44,290 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:39:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:48,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:48,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142648927] [2022-02-24 01:39:48,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142648927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:48,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:48,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-24 01:39:48,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526988464] [2022-02-24 01:39:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-24 01:39:48,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-24 01:39:48,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9876, Invalid=10716, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 01:39:48,556 INFO L87 Difference]: Start difference. First operand 591 states and 691 transitions. Second operand has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 142 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 01:39:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:59,379 INFO L93 Difference]: Finished difference Result 719 states and 859 transitions. [2022-02-24 01:39:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-02-24 01:39:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 142 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 01:39:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:59,380 INFO L225 Difference]: With dead ends: 719 [2022-02-24 01:39:59,381 INFO L226 Difference]: Without dead ends: 713 [2022-02-24 01:39:59,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10283 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=29624, Invalid=51316, Unknown=0, NotChecked=0, Total=80940 [2022-02-24 01:39:59,384 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2297 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2297 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:59,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2297 Valid, 55 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:39:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-24 01:39:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 593. [2022-02-24 01:39:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 588 states have (on average 1.1717687074829932) internal successors, (689), 588 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 693 transitions. [2022-02-24 01:39:59,761 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 693 transitions. Word has length 293 [2022-02-24 01:39:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:59,762 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 693 transitions. [2022-02-24 01:39:59,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 142 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 01:39:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 693 transitions. [2022-02-24 01:39:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-02-24 01:39:59,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:59,763 INFO L514 BasicCegarLoop]: trace histogram [140, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-24 01:39:59,763 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash -876249150, now seen corresponding path program 139 times [2022-02-24 01:39:59,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:59,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167239511] [2022-02-24 01:39:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:59,764 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:39:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:03,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:03,262 INFO 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 01:40:03,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:03,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167239511] [2022-02-24 01:40:03,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167239511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:03,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:03,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-02-24 01:40:03,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406530963] [2022-02-24 01:40:03,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:03,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-02-24 01:40:03,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-02-24 01:40:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10017, Invalid=10863, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 01:40:03,266 INFO L87 Difference]: Start difference. First operand 593 states and 693 transitions. Second operand has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:14,316 INFO L93 Difference]: Finished difference Result 724 states and 865 transitions. [2022-02-24 01:40:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-24 01:40:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-02-24 01:40:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:14,317 INFO L225 Difference]: With dead ends: 724 [2022-02-24 01:40:14,317 INFO L226 Difference]: Without dead ends: 718 [2022-02-24 01:40:14,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10427 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=30047, Invalid=52035, Unknown=0, NotChecked=0, Total=82082 [2022-02-24 01:40:14,320 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2372 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:14,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2372 Valid, 45 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:40:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-24 01:40:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 595. [2022-02-24 01:40:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 590 states have (on average 1.1711864406779662) internal successors, (691), 590 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 695 transitions. [2022-02-24 01:40:14,697 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 695 transitions. Word has length 295 [2022-02-24 01:40:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:14,697 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 695 transitions. [2022-02-24 01:40:14,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 143 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 695 transitions. [2022-02-24 01:40:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-02-24 01:40:14,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:14,698 INFO L514 BasicCegarLoop]: trace histogram [141, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:14,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-24 01:40:14,698 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash -620338947, now seen corresponding path program 140 times [2022-02-24 01:40:14,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:14,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245022440] [2022-02-24 01:40:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:14,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:14,699 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:40:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:19,601 INFO 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 01:40:19,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:19,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245022440] [2022-02-24 01:40:19,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [245022440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:19,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:19,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-24 01:40:19,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330146274] [2022-02-24 01:40:19,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:19,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-24 01:40:19,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-24 01:40:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10159, Invalid=11011, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 01:40:19,604 INFO L87 Difference]: Start difference. First operand 595 states and 695 transitions. Second operand has 146 states, 146 states have (on average 2.006849315068493) internal successors, (293), 144 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 01:40:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:31,616 INFO L93 Difference]: Finished difference Result 729 states and 871 transitions. [2022-02-24 01:40:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-24 01:40:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.006849315068493) internal successors, (293), 144 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 01:40:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:31,617 INFO L225 Difference]: With dead ends: 729 [2022-02-24 01:40:31,617 INFO L226 Difference]: Without dead ends: 723 [2022-02-24 01:40:31,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10572 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=30473, Invalid=52759, Unknown=0, NotChecked=0, Total=83232 [2022-02-24 01:40:31,621 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1866 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:31,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1866 Valid, 80 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:40:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-02-24 01:40:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 597. [2022-02-24 01:40:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 592 states have (on average 1.1706081081081081) internal successors, (693), 592 states have internal predecessors, (693), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 697 transitions. [2022-02-24 01:40:32,009 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 697 transitions. Word has length 297 [2022-02-24 01:40:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:32,009 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 697 transitions. [2022-02-24 01:40:32,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.006849315068493) internal successors, (293), 144 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 01:40:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 697 transitions. [2022-02-24 01:40:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-24 01:40:32,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:32,010 INFO L514 BasicCegarLoop]: trace histogram [142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:32,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-24 01:40:32,010 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash 496230264, now seen corresponding path program 141 times [2022-02-24 01:40:32,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:32,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484879761] [2022-02-24 01:40:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:32,011 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:40:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:37,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:37,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484879761] [2022-02-24 01:40:37,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484879761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:37,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:37,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 01:40:37,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690357618] [2022-02-24 01:40:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:37,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 01:40:37,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 01:40:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=11160, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 01:40:37,112 INFO L87 Difference]: Start difference. First operand 597 states and 697 transitions. Second operand has 147 states, 147 states have (on average 2.006802721088435) internal successors, (295), 145 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:48,732 INFO L93 Difference]: Finished difference Result 734 states and 877 transitions. [2022-02-24 01:40:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 01:40:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.006802721088435) internal successors, (295), 145 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-02-24 01:40:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:48,733 INFO L225 Difference]: With dead ends: 734 [2022-02-24 01:40:48,733 INFO L226 Difference]: Without dead ends: 728 [2022-02-24 01:40:48,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10718 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=30902, Invalid=53488, Unknown=0, NotChecked=0, Total=84390 [2022-02-24 01:40:48,736 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2037 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:48,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 55 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:40:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-24 01:40:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 599. [2022-02-24 01:40:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 594 states have (on average 1.17003367003367) internal successors, (695), 594 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 699 transitions. [2022-02-24 01:40:49,125 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 699 transitions. Word has length 299 [2022-02-24 01:40:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:49,125 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 699 transitions. [2022-02-24 01:40:49,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.006802721088435) internal successors, (295), 145 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 699 transitions. [2022-02-24 01:40:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-02-24 01:40:49,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:49,126 INFO L514 BasicCegarLoop]: trace histogram [143, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:49,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-24 01:40:49,126 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -222581965, now seen corresponding path program 142 times [2022-02-24 01:40:49,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:49,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427738844] [2022-02-24 01:40:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:49,128 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:40:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:53,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427738844] [2022-02-24 01:40:53,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [427738844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:53,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:53,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-02-24 01:40:53,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603139719] [2022-02-24 01:40:53,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:53,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-02-24 01:40:53,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-02-24 01:40:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10446, Invalid=11310, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 01:40:53,454 INFO L87 Difference]: Start difference. First operand 599 states and 699 transitions. Second operand has 148 states, 148 states have (on average 2.0067567567567566) internal successors, (297), 146 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 01:41:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:05,942 INFO L93 Difference]: Finished difference Result 739 states and 883 transitions. [2022-02-24 01:41:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-02-24 01:41:05,942 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.0067567567567566) internal successors, (297), 146 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 01:41:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:05,943 INFO L225 Difference]: With dead ends: 739 [2022-02-24 01:41:05,943 INFO L226 Difference]: Without dead ends: 733 [2022-02-24 01:41:05,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10865 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=31334, Invalid=54222, Unknown=0, NotChecked=0, Total=85556 [2022-02-24 01:41:05,946 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2040 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:05,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 65 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:41:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-24 01:41:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 601. [2022-02-24 01:41:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 596 states have (on average 1.169463087248322) internal successors, (697), 596 states have internal predecessors, (697), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 701 transitions. [2022-02-24 01:41:06,339 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 701 transitions. Word has length 301 [2022-02-24 01:41:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:06,339 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 701 transitions. [2022-02-24 01:41:06,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.0067567567567566) internal successors, (297), 146 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 01:41:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 701 transitions. [2022-02-24 01:41:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-02-24 01:41:06,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:06,341 INFO L514 BasicCegarLoop]: trace histogram [144, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:06,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-24 01:41:06,346 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:06,347 INFO L85 PathProgramCache]: Analyzing trace with hash 488600622, now seen corresponding path program 143 times [2022-02-24 01:41:06,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:06,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054701030] [2022-02-24 01:41:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:06,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:06,348 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:41:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:10,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:10,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054701030] [2022-02-24 01:41:10,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054701030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:10,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:10,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-24 01:41:10,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128268298] [2022-02-24 01:41:10,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:10,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-24 01:41:10,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-24 01:41:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10591, Invalid=11461, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 01:41:10,816 INFO L87 Difference]: Start difference. First operand 601 states and 701 transitions. Second operand has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:23,728 INFO L93 Difference]: Finished difference Result 744 states and 889 transitions. [2022-02-24 01:41:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-24 01:41:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-02-24 01:41:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:23,729 INFO L225 Difference]: With dead ends: 744 [2022-02-24 01:41:23,729 INFO L226 Difference]: Without dead ends: 738 [2022-02-24 01:41:23,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11013 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=31769, Invalid=54961, Unknown=0, NotChecked=0, Total=86730 [2022-02-24 01:41:23,754 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2349 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:23,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2349 Valid, 55 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:41:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-02-24 01:41:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 603. [2022-02-24 01:41:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 598 states have (on average 1.1688963210702341) internal successors, (699), 598 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 703 transitions. [2022-02-24 01:41:24,139 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 703 transitions. Word has length 303 [2022-02-24 01:41:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 703 transitions. [2022-02-24 01:41:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 147 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 703 transitions. [2022-02-24 01:41:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-02-24 01:41:24,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:24,141 INFO L514 BasicCegarLoop]: trace histogram [145, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:24,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-24 01:41:24,141 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1035266665, now seen corresponding path program 144 times [2022-02-24 01:41:24,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:24,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726901223] [2022-02-24 01:41:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:24,142 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:41:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:29,011 INFO 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 01:41:29,011 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:29,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726901223] [2022-02-24 01:41:29,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [726901223] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:29,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:29,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-24 01:41:29,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504410093] [2022-02-24 01:41:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:29,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-24 01:41:29,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-24 01:41:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10737, Invalid=11613, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 01:41:29,015 INFO L87 Difference]: Start difference. First operand 603 states and 703 transitions. Second operand has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 148 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 01:41:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:40,832 INFO L93 Difference]: Finished difference Result 749 states and 895 transitions. [2022-02-24 01:41:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-24 01:41:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 148 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 01:41:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:40,833 INFO L225 Difference]: With dead ends: 749 [2022-02-24 01:41:40,833 INFO L226 Difference]: Without dead ends: 743 [2022-02-24 01:41:40,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=32207, Invalid=55705, Unknown=0, NotChecked=0, Total=87912 [2022-02-24 01:41:40,836 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2602 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:40,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2602 Valid, 45 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:41:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-24 01:41:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 605. [2022-02-24 01:41:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 600 states have (on average 1.1683333333333332) internal successors, (701), 600 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 705 transitions. [2022-02-24 01:41:41,225 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 705 transitions. Word has length 305 [2022-02-24 01:41:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:41,225 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 705 transitions. [2022-02-24 01:41:41,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.006666666666667) internal successors, (301), 148 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 01:41:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 705 transitions. [2022-02-24 01:41:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-02-24 01:41:41,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:41,226 INFO L514 BasicCegarLoop]: trace histogram [146, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:41,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-24 01:41:41,226 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1899643420, now seen corresponding path program 145 times [2022-02-24 01:41:41,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:41,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043959858] [2022-02-24 01:41:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:41,227 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:41:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:44,997 INFO 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 01:41:44,997 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:44,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043959858] [2022-02-24 01:41:44,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043959858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:44,997 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:44,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-02-24 01:41:44,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759526374] [2022-02-24 01:41:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-02-24 01:41:44,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-02-24 01:41:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10884, Invalid=11766, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 01:41:45,003 INFO L87 Difference]: Start difference. First operand 605 states and 705 transitions. Second operand has 151 states, 151 states have (on average 2.006622516556291) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:58,583 INFO L93 Difference]: Finished difference Result 754 states and 901 transitions. [2022-02-24 01:41:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-24 01:41:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.006622516556291) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-02-24 01:41:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:58,585 INFO L225 Difference]: With dead ends: 754 [2022-02-24 01:41:58,585 INFO L226 Difference]: Without dead ends: 748 [2022-02-24 01:41:58,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11312 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=32648, Invalid=56454, Unknown=0, NotChecked=0, Total=89102 [2022-02-24 01:41:58,588 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2338 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2338 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:58,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2338 Valid, 55 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:41:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-24 01:41:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 607. [2022-02-24 01:41:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 602 states have (on average 1.1677740863787376) internal successors, (703), 602 states have internal predecessors, (703), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 707 transitions. [2022-02-24 01:41:58,985 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 707 transitions. Word has length 307 [2022-02-24 01:41:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 707 transitions. [2022-02-24 01:41:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.006622516556291) internal successors, (303), 149 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 707 transitions. [2022-02-24 01:41:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-24 01:41:58,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:58,986 INFO L514 BasicCegarLoop]: trace histogram [147, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-24 01:41:58,986 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash -554721633, now seen corresponding path program 146 times [2022-02-24 01:41:58,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:58,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864396576] [2022-02-24 01:41:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:58,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:58,987 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:41:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:02,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:02,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864396576] [2022-02-24 01:42:02,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864396576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:02,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:02,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-24 01:42:02,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726666830] [2022-02-24 01:42:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-24 01:42:02,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-24 01:42:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11032, Invalid=11920, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 01:42:02,859 INFO L87 Difference]: Start difference. First operand 607 states and 707 transitions. Second operand has 152 states, 152 states have (on average 2.0065789473684212) internal successors, (305), 150 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 01:42:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:16,064 INFO L93 Difference]: Finished difference Result 759 states and 907 transitions. [2022-02-24 01:42:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-24 01:42:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0065789473684212) internal successors, (305), 150 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 01:42:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:16,065 INFO L225 Difference]: With dead ends: 759 [2022-02-24 01:42:16,065 INFO L226 Difference]: Without dead ends: 753 [2022-02-24 01:42:16,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11463 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=33092, Invalid=57208, Unknown=0, NotChecked=0, Total=90300 [2022-02-24 01:42:16,069 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2240 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2240 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:16,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2240 Valid, 65 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:42:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-24 01:42:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 609. [2022-02-24 01:42:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 604 states have (on average 1.1672185430463575) internal successors, (705), 604 states have internal predecessors, (705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 709 transitions. [2022-02-24 01:42:16,474 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 709 transitions. Word has length 309 [2022-02-24 01:42:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:16,474 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 709 transitions. [2022-02-24 01:42:16,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0065789473684212) internal successors, (305), 150 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 01:42:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 709 transitions. [2022-02-24 01:42:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-02-24 01:42:16,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:16,475 INFO L514 BasicCegarLoop]: trace histogram [148, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:16,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-24 01:42:16,475 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -870040422, now seen corresponding path program 147 times [2022-02-24 01:42:16,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:16,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424653863] [2022-02-24 01:42:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:16,477 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:42:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:20,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:20,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424653863] [2022-02-24 01:42:20,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [424653863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:20,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:20,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 01:42:20,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155561948] [2022-02-24 01:42:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:20,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 01:42:20,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 01:42:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11181, Invalid=12075, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 01:42:20,959 INFO L87 Difference]: Start difference. First operand 609 states and 709 transitions. Second operand has 153 states, 153 states have (on average 2.0065359477124183) internal successors, (307), 151 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)