/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:11:43,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:11:43,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:11:43,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:11:43,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:11:43,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:11:43,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:11:43,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:11:43,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:11:43,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:11:43,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:11:43,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:11:43,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:43,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:11:43,915 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:11:43,916 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:11:44,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:11:44,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:11:44,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:11:44,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:11:44,125 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:11:44,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-15 01:11:44,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a115b7f2/035a4d5b127e43afa4a30c5234127333/FLAGa4fc749d8 [2022-02-15 01:11:44,549 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:11:44,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-15 01:11:44,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a115b7f2/035a4d5b127e43afa4a30c5234127333/FLAGa4fc749d8 [2022-02-15 01:11:44,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a115b7f2/035a4d5b127e43afa4a30c5234127333 [2022-02-15 01:11:44,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:11:44,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:11:44,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:44,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:11:44,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:11:44,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558568e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44, skipping insertion in model container [2022-02-15 01:11:44,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:11:44,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:11:44,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-02-15 01:11:44,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:44,770 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:11:44,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-02-15 01:11:44,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:44,804 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:11:44,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44 WrapperNode [2022-02-15 01:11:44,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:44,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:11:44,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:11:44,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:11:44,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:11:44,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:11:44,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:11:44,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:11:44,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (1/1) ... [2022-02-15 01:11:44,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:11:44,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:11:44,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:11:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:11:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:11:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:11:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:11:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:11:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:11:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:11:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:11:44,974 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:11:44,976 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:11:45,078 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:11:45,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:11:45,082 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-15 01:11:45,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:45 BoogieIcfgContainer [2022-02-15 01:11:45,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:11:45,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:11:45,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:11:45,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:11:45,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:11:44" (1/3) ... [2022-02-15 01:11:45,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4291771f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:45, skipping insertion in model container [2022-02-15 01:11:45,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:44" (2/3) ... [2022-02-15 01:11:45,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4291771f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:45, skipping insertion in model container [2022-02-15 01:11:45,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:45" (3/3) ... [2022-02-15 01:11:45,091 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-02-15 01:11:45,094 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:11:45,094 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:11:45,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:11:45,127 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:11:45,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:11:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:11:45,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:45,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-02-15 01:11:45,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267620273] [2022-02-15 01:11:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,254 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:45,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:45,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267620273] [2022-02-15 01:11:45,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267620273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:45,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:45,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:45,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388290301] [2022-02-15 01:11:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:45,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:45,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:45,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:45,501 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-02-15 01:11:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:45,694 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-02-15 01:11:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:11:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-02-15 01:11:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:45,700 INFO L225 Difference]: With dead ends: 67 [2022-02-15 01:11:45,700 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:11:45,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:45,708 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:45,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:11:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-15 01:11:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-02-15 01:11:45,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-02-15 01:11:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:45,742 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-02-15 01:11:45,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-02-15 01:11:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-02-15 01:11:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:11:45,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:45,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:11:45,745 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-02-15 01:11:45,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353700611] [2022-02-15 01:11:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,764 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:45,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:45,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353700611] [2022-02-15 01:11:45,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353700611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:45,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:45,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:11:45,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946884863] [2022-02-15 01:11:45,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:45,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:11:45,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:11:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:45,916 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,040 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-15 01:11:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:11:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:11:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,041 INFO L225 Difference]: With dead ends: 63 [2022-02-15 01:11:46,041 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:11:46,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:46,043 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:46,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:11:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-15 01:11:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-02-15 01:11:46,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-02-15 01:11:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,059 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-02-15 01:11:46,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-15 01:11:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:46,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:11:46,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2022-02-15 01:11:46,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900873128] [2022-02-15 01:11:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:46,071 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:46,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,072 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900873128] [2022-02-15 01:11:46,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [900873128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:11:46,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094107349] [2022-02-15 01:11:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:11:46,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:11:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:46,456 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2022-02-15 01:11:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,867 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-02-15 01:11:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:11:46,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 [2022-02-15 01:11:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,871 INFO L225 Difference]: With dead ends: 83 [2022-02-15 01:11:46,871 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 01:11:46,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:11:46,873 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:46,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 01:11:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-02-15 01:11:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-02-15 01:11:46,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2022-02-15 01:11:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,885 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-02-15 01:11:46,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2022-02-15 01:11:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-02-15 01:11:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:46,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:11:46,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2022-02-15 01:11:46,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632357664] [2022-02-15 01:11:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:46,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632357664] [2022-02-15 01:11:46,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632357664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:46,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482210151] [2022-02-15 01:11:46,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:46,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:46,939 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-15 01:11:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,024 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-02-15 01:11:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:11:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 25 [2022-02-15 01:11:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,026 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:11:47,026 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 01:11:47,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:47,027 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 01:11:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-15 01:11:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-15 01:11:47,037 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-02-15 01:11:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,037 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-15 01:11:47,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-15 01:11:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-15 01:11:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:11:47,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:11:47,039 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-02-15 01:11:47,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497118014] [2022-02-15 01:11:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,041 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,042 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,432 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497118014] [2022-02-15 01:11:47,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [497118014] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,432 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:11:47,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555509813] [2022-02-15 01:11:47,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:11:47,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:11:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:11:47,434 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,107 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-02-15 01:11:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:11:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:11:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,108 INFO L225 Difference]: With dead ends: 126 [2022-02-15 01:11:48,108 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 01:11:48,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:11:48,110 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 70 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 01:11:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 56. [2022-02-15 01:11:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-02-15 01:11:48,120 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 30 [2022-02-15 01:11:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,121 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-02-15 01:11:48,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-02-15 01:11:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:48,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:11:48,122 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2022-02-15 01:11:48,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206272591] [2022-02-15 01:11:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,125 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,126 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206272591] [2022-02-15 01:11:48,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206272591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:48,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795622425] [2022-02-15 01:11:48,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:48,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:48,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:48,215 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,384 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2022-02-15 01:11:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:11:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:11:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,385 INFO L225 Difference]: With dead ends: 147 [2022-02-15 01:11:48,385 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 01:11:48,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:48,386 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 01:11:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-02-15 01:11:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-02-15 01:11:48,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 31 [2022-02-15 01:11:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,403 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-02-15 01:11:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-02-15 01:11:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:48,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:11:48,404 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-02-15 01:11:48,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128957709] [2022-02-15 01:11:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,407 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,408 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:11:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128957709] [2022-02-15 01:11:48,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [128957709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:48,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041332707] [2022-02-15 01:11:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:48,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:48,486 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,709 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-02-15 01:11:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-15 01:11:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,710 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:11:48,711 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 01:11:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:48,711 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 01:11:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2022-02-15 01:11:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-02-15 01:11:48,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2022-02-15 01:11:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-02-15 01:11:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-02-15 01:11:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:48,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,726 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:11:48,727 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2022-02-15 01:11:48,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16771713] [2022-02-15 01:11:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,730 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16771713] [2022-02-15 01:11:49,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [16771713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:11:49,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021362521] [2022-02-15 01:11:49,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:11:49,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:11:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:11:49,063 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2022-02-15 01:11:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,579 INFO L93 Difference]: Finished difference Result 174 states and 215 transitions. [2022-02-15 01:11:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:11:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 [2022-02-15 01:11:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,581 INFO L225 Difference]: With dead ends: 174 [2022-02-15 01:11:49,581 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:11:49,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:11:49,583 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 161 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 63 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:11:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 74. [2022-02-15 01:11:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-02-15 01:11:49,599 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 33 [2022-02-15 01:11:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-02-15 01:11:49,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2022-02-15 01:11:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-02-15 01:11:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:11:49,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:11:49,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-02-15 01:11:49,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968843149] [2022-02-15 01:11:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,603 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,604 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968843149] [2022-02-15 01:11:49,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968843149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:11:49,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383253738] [2022-02-15 01:11:49,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:11:49,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:11:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:11:49,828 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:50,629 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-02-15 01:11:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:11:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:11:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:50,630 INFO L225 Difference]: With dead ends: 197 [2022-02-15 01:11:50,631 INFO L226 Difference]: Without dead ends: 157 [2022-02-15 01:11:50,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=555, Invalid=1995, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:11:50,632 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:50,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 71 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-15 01:11:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 80. [2022-02-15 01:11:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 73 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-02-15 01:11:50,649 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 38 [2022-02-15 01:11:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:50,649 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-02-15 01:11:50,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-02-15 01:11:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:11:50,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:50,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:50,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:11:50,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1626849634, now seen corresponding path program 2 times [2022-02-15 01:11:50,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:50,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460931688] [2022-02-15 01:11:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:50,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,652 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:50,653 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460931688] [2022-02-15 01:11:50,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [460931688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:50,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527647155] [2022-02-15 01:11:50,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:50,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:50,695 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:50,852 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-02-15 01:11:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:11:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:11:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:50,854 INFO L225 Difference]: With dead ends: 165 [2022-02-15 01:11:50,854 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 01:11:50,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:50,854 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:50,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 48 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 01:11:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2022-02-15 01:11:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.2) internal successors, (96), 81 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-02-15 01:11:50,872 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 38 [2022-02-15 01:11:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:50,873 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-02-15 01:11:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-02-15 01:11:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:11:50,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:50,873 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:50,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:11:50,874 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2022-02-15 01:11:50,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:50,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854051225] [2022-02-15 01:11:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:50,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:50,877 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:51,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:51,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854051225] [2022-02-15 01:11:51,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854051225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:51,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:51,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:11:51,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864363444] [2022-02-15 01:11:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:51,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:11:51,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:11:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:11:51,349 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:52,289 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-02-15 01:11:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:11:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:11:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:52,291 INFO L225 Difference]: With dead ends: 245 [2022-02-15 01:11:52,291 INFO L226 Difference]: Without dead ends: 193 [2022-02-15 01:11:52,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:11:52,292 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:52,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:11:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-15 01:11:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 125. [2022-02-15 01:11:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 118 states have internal predecessors, (146), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2022-02-15 01:11:52,332 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 38 [2022-02-15 01:11:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:52,333 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2022-02-15 01:11:52,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2022-02-15 01:11:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:11:52,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:52,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:52,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:11:52,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2114079652, now seen corresponding path program 4 times [2022-02-15 01:11:52,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:52,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9062531] [2022-02-15 01:11:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:52,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:52,336 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:52,337 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:52,425 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:52,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9062531] [2022-02-15 01:11:52,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [9062531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:52,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:52,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:52,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683268357] [2022-02-15 01:11:52,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:52,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:52,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:52,427 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:52,781 INFO L93 Difference]: Finished difference Result 328 states and 407 transitions. [2022-02-15 01:11:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:11:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 [2022-02-15 01:11:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:52,783 INFO L225 Difference]: With dead ends: 328 [2022-02-15 01:11:52,783 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 01:11:52,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:11:52,784 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:52,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 78 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 01:11:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2022-02-15 01:11:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 152 states have internal predecessors, (185), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-02-15 01:11:52,824 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 39 [2022-02-15 01:11:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-02-15 01:11:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-02-15 01:11:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:11:52,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:52,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:52,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:11:52,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-02-15 01:11:52,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:52,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492698961] [2022-02-15 01:11:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:52,827 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:52,827 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:52,828 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:11:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:53,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:53,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492698961] [2022-02-15 01:11:53,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [492698961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:53,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:53,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:11:53,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031267638] [2022-02-15 01:11:53,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:53,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:11:53,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:11:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:53,010 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:53,546 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2022-02-15 01:11:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:11:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-15 01:11:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:53,548 INFO L225 Difference]: With dead ends: 222 [2022-02-15 01:11:53,548 INFO L226 Difference]: Without dead ends: 220 [2022-02-15 01:11:53,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:11:53,549 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 133 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 79 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-15 01:11:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 179. [2022-02-15 01:11:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 170 states have internal predecessors, (204), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2022-02-15 01:11:53,593 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 41 [2022-02-15 01:11:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2022-02-15 01:11:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2022-02-15 01:11:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:11:53,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:53,595 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:53,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:11:53,595 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1706177446, now seen corresponding path program 5 times [2022-02-15 01:11:53,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:53,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455488293] [2022-02-15 01:11:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:53,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:53,598 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:54,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:54,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455488293] [2022-02-15 01:11:54,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [455488293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:54,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:54,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:11:54,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881917471] [2022-02-15 01:11:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:54,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:11:54,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:11:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:11:54,010 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:54,620 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2022-02-15 01:11:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:11:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2022-02-15 01:11:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:54,622 INFO L225 Difference]: With dead ends: 302 [2022-02-15 01:11:54,622 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 01:11:54,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:11:54,623 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:54,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 71 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 01:11:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 161. [2022-02-15 01:11:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 151 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-02-15 01:11:54,666 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 41 [2022-02-15 01:11:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:54,666 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-02-15 01:11:54,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-02-15 01:11:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:11:54,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:54,667 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:54,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:11:54,667 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 4 times [2022-02-15 01:11:54,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:54,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365540572] [2022-02-15 01:11:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:54,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:54,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:54,669 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:55,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:55,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365540572] [2022-02-15 01:11:55,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365540572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:55,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:55,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:11:55,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722783082] [2022-02-15 01:11:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:55,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:11:55,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:11:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:11:55,011 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:56,040 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2022-02-15 01:11:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:11:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 [2022-02-15 01:11:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:56,041 INFO L225 Difference]: With dead ends: 281 [2022-02-15 01:11:56,042 INFO L226 Difference]: Without dead ends: 227 [2022-02-15 01:11:56,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:11:56,043 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 181 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:56,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 95 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:11:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-15 01:11:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 168. [2022-02-15 01:11:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 158 states have internal predecessors, (180), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2022-02-15 01:11:56,092 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 43 [2022-02-15 01:11:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:56,092 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2022-02-15 01:11:56,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2022-02-15 01:11:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:56,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:56,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:56,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:11:56,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-02-15 01:11:56,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:56,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527738187] [2022-02-15 01:11:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:56,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:56,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:56,095 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:11:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:56,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:56,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527738187] [2022-02-15 01:11:56,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527738187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:56,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:56,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:11:56,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068797813] [2022-02-15 01:11:56,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:56,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:11:56,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:11:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:11:56,284 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:56,881 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2022-02-15 01:11:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:11:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 01:11:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:56,882 INFO L225 Difference]: With dead ends: 217 [2022-02-15 01:11:56,882 INFO L226 Difference]: Without dead ends: 215 [2022-02-15 01:11:56,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:11:56,883 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:56,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 105 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-15 01:11:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 172. [2022-02-15 01:11:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 159 states have (on average 1.169811320754717) internal successors, (186), 162 states have internal predecessors, (186), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 199 transitions. [2022-02-15 01:11:56,934 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 199 transitions. Word has length 46 [2022-02-15 01:11:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:56,934 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 199 transitions. [2022-02-15 01:11:56,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 199 transitions. [2022-02-15 01:11:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:56,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:56,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:56,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:11:56,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 1 times [2022-02-15 01:11:56,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:56,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034899218] [2022-02-15 01:11:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:56,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:56,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:56,937 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:57,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:57,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034899218] [2022-02-15 01:11:57,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034899218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:57,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:57,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:11:57,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869926260] [2022-02-15 01:11:57,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:57,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:11:57,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:57,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:11:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:11:57,331 INFO L87 Difference]: Start difference. First operand 172 states and 199 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:57,903 INFO L93 Difference]: Finished difference Result 234 states and 272 transitions. [2022-02-15 01:11:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:11:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 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 46 [2022-02-15 01:11:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:57,904 INFO L225 Difference]: With dead ends: 234 [2022-02-15 01:11:57,904 INFO L226 Difference]: Without dead ends: 232 [2022-02-15 01:11:57,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:11:57,905 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:57,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 61 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-15 01:11:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 178. [2022-02-15 01:11:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 168 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 208 transitions. [2022-02-15 01:11:57,957 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 208 transitions. Word has length 46 [2022-02-15 01:11:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:57,958 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 208 transitions. [2022-02-15 01:11:57,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 208 transitions. [2022-02-15 01:11:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:57,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:57,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:57,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:11:57,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2022-02-15 01:11:57,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:57,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592396918] [2022-02-15 01:11:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:57,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:57,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:57,961 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:58,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:58,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592396918] [2022-02-15 01:11:58,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592396918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:58,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:58,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:11:58,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484096009] [2022-02-15 01:11:58,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:11:58,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:11:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:11:58,444 INFO L87 Difference]: Start difference. First operand 178 states and 208 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:59,804 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2022-02-15 01:11:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:11:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 01:11:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:59,806 INFO L225 Difference]: With dead ends: 271 [2022-02-15 01:11:59,806 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 01:11:59,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=2799, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:11:59,807 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 193 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:59,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 111 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:11:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 01:11:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 184. [2022-02-15 01:11:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 174 states have internal predecessors, (203), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2022-02-15 01:11:59,876 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 46 [2022-02-15 01:11:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:59,876 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2022-02-15 01:11:59,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2022-02-15 01:11:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:11:59,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:59,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:59,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:11:59,877 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2022-02-15 01:11:59,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:59,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654655664] [2022-02-15 01:11:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:59,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:59,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:59,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:59,879 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:11:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:11:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:59,975 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:59,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654655664] [2022-02-15 01:11:59,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654655664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:59,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:59,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:59,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488298327] [2022-02-15 01:11:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:59,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:59,977 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:00,299 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2022-02-15 01:12:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:12:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-15 01:12:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:00,316 INFO L225 Difference]: With dead ends: 264 [2022-02-15 01:12:00,316 INFO L226 Difference]: Without dead ends: 231 [2022-02-15 01:12:00,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:00,317 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:00,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 61 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-15 01:12:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 175. [2022-02-15 01:12:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.165644171779141) internal successors, (190), 166 states have internal predecessors, (190), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-02-15 01:12:00,383 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 49 [2022-02-15 01:12:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:00,383 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-02-15 01:12:00,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-02-15 01:12:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:12:00,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:00,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:00,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:12:00,384 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2022-02-15 01:12:00,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:00,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534057701] [2022-02-15 01:12:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:00,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:00,386 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:00,388 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:00,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:00,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534057701] [2022-02-15 01:12:00,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534057701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:00,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:00,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:12:00,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656525205] [2022-02-15 01:12:00,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:00,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:12:00,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:12:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:00,631 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:01,275 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2022-02-15 01:12:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:12:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 01:12:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:01,277 INFO L225 Difference]: With dead ends: 223 [2022-02-15 01:12:01,277 INFO L226 Difference]: Without dead ends: 221 [2022-02-15 01:12:01,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:12:01,278 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 143 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:01,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 86 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-15 01:12:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2022-02-15 01:12:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2022-02-15 01:12:01,340 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 49 [2022-02-15 01:12:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:01,340 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2022-02-15 01:12:01,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2022-02-15 01:12:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:01,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:01,341 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:01,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:12:01,341 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2022-02-15 01:12:01,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:01,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214330982] [2022-02-15 01:12:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:01,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:01,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:01,356 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:01,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:12:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:01,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:01,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214330982] [2022-02-15 01:12:01,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [214330982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:01,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:01,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:01,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866759103] [2022-02-15 01:12:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:01,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:01,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:01,982 INFO L87 Difference]: Start difference. First operand 195 states and 226 transitions. Second operand has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:03,561 INFO L93 Difference]: Finished difference Result 262 states and 301 transitions. [2022-02-15 01:12:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:12:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-02-15 01:12:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:03,562 INFO L225 Difference]: With dead ends: 262 [2022-02-15 01:12:03,562 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:12:03,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=526, Invalid=3380, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:12:03,563 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:03,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:12:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2022-02-15 01:12:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 192 states have (on average 1.1510416666666667) internal successors, (221), 197 states have internal predecessors, (221), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 239 transitions. [2022-02-15 01:12:03,631 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 239 transitions. Word has length 51 [2022-02-15 01:12:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:03,632 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 239 transitions. [2022-02-15 01:12:03,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 239 transitions. [2022-02-15 01:12:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:03,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:03,633 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:03,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:12:03,633 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2022-02-15 01:12:03,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:03,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025810744] [2022-02-15 01:12:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:03,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:03,635 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:03,666 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:03,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025810744] [2022-02-15 01:12:03,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025810744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:03,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:03,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:12:03,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908215959] [2022-02-15 01:12:03,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:03,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:12:03,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:12:03,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:12:03,667 INFO L87 Difference]: Start difference. First operand 208 states and 239 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:03,851 INFO L93 Difference]: Finished difference Result 296 states and 346 transitions. [2022-02-15 01:12:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:12:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:12:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:03,853 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:12:03,853 INFO L226 Difference]: Without dead ends: 234 [2022-02-15 01:12:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:12:03,854 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:03,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 59 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-15 01:12:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2022-02-15 01:12:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 180 states have (on average 1.1333333333333333) internal successors, (204), 185 states have internal predecessors, (204), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2022-02-15 01:12:03,922 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 51 [2022-02-15 01:12:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:03,922 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2022-02-15 01:12:03,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2022-02-15 01:12:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:03,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:03,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:03,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:12:03,923 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:03,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2022-02-15 01:12:03,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:03,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691353253] [2022-02-15 01:12:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:03,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:03,925 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:04,208 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:04,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691353253] [2022-02-15 01:12:04,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691353253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:04,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:04,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:12:04,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309747334] [2022-02-15 01:12:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:04,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:12:04,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:12:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:04,209 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:05,103 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2022-02-15 01:12:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:12:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:05,105 INFO L225 Difference]: With dead ends: 259 [2022-02-15 01:12:05,105 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 01:12:05,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:12:05,106 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:05,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 85 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 01:12:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 225. [2022-02-15 01:12:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.1626794258373205) internal successors, (243), 214 states have internal predecessors, (243), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 261 transitions. [2022-02-15 01:12:05,185 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 261 transitions. Word has length 51 [2022-02-15 01:12:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:05,185 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 261 transitions. [2022-02-15 01:12:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 261 transitions. [2022-02-15 01:12:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:05,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:05,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:05,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:12:05,186 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2022-02-15 01:12:05,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:05,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519504928] [2022-02-15 01:12:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:05,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:05,187 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:05,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:05,188 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:05,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:05,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:05,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519504928] [2022-02-15 01:12:05,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [519504928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:05,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:05,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:05,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378378849] [2022-02-15 01:12:05,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:05,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:05,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:05,707 INFO L87 Difference]: Start difference. First operand 225 states and 261 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:06,892 INFO L93 Difference]: Finished difference Result 360 states and 420 transitions. [2022-02-15 01:12:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:12:06,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 [2022-02-15 01:12:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:06,893 INFO L225 Difference]: With dead ends: 360 [2022-02-15 01:12:06,893 INFO L226 Difference]: Without dead ends: 306 [2022-02-15 01:12:06,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=2868, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:12:06,894 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 197 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:06,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 101 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-15 01:12:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 223. [2022-02-15 01:12:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 209 states have (on average 1.167464114832536) internal successors, (244), 212 states have internal predecessors, (244), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 258 transitions. [2022-02-15 01:12:06,973 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 258 transitions. Word has length 51 [2022-02-15 01:12:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:06,974 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 258 transitions. [2022-02-15 01:12:06,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 258 transitions. [2022-02-15 01:12:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:06,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:06,974 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:06,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:12:06,975 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:06,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2022-02-15 01:12:06,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:06,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786329535] [2022-02-15 01:12:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:06,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:06,976 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:06,977 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:07,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:07,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786329535] [2022-02-15 01:12:07,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786329535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:07,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:07,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:07,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169280388] [2022-02-15 01:12:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:07,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:07,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:07,432 INFO L87 Difference]: Start difference. First operand 223 states and 258 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:08,477 INFO L93 Difference]: Finished difference Result 326 states and 384 transitions. [2022-02-15 01:12:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 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 51 [2022-02-15 01:12:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:08,479 INFO L225 Difference]: With dead ends: 326 [2022-02-15 01:12:08,479 INFO L226 Difference]: Without dead ends: 282 [2022-02-15 01:12:08,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=527, Invalid=2553, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:12:08,480 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 133 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:08,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 69 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-15 01:12:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2022-02-15 01:12:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.1743119266055047) internal successors, (256), 221 states have internal predecessors, (256), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2022-02-15 01:12:08,566 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 51 [2022-02-15 01:12:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2022-02-15 01:12:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2022-02-15 01:12:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:12:08,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:08,567 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:08,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:12:08,568 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 417331817, now seen corresponding path program 2 times [2022-02-15 01:12:08,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:08,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283314287] [2022-02-15 01:12:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:08,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:08,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:08,570 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:08,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 01:12:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:08,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:08,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283314287] [2022-02-15 01:12:08,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [283314287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:08,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:08,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:12:08,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416004539] [2022-02-15 01:12:08,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:08,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:12:08,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:12:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:12:08,609 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:08,804 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2022-02-15 01:12:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:12:08,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-15 01:12:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:08,806 INFO L225 Difference]: With dead ends: 309 [2022-02-15 01:12:08,806 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 01:12:08,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:12:08,806 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:08,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 62 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 01:12:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 241. [2022-02-15 01:12:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.171806167400881) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2022-02-15 01:12:08,897 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 54 [2022-02-15 01:12:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:08,898 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2022-02-15 01:12:08,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2022-02-15 01:12:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:12:08,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:08,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:08,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:12:08,899 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2022-02-15 01:12:08,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:08,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726642632] [2022-02-15 01:12:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:08,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:08,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:08,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 01:12:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:09,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:09,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726642632] [2022-02-15 01:12:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726642632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:09,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:12:09,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532193027] [2022-02-15 01:12:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:09,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:12:09,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:12:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:09,076 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:10,016 INFO L93 Difference]: Finished difference Result 452 states and 542 transitions. [2022-02-15 01:12:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:12:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-15 01:12:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:10,018 INFO L225 Difference]: With dead ends: 452 [2022-02-15 01:12:10,018 INFO L226 Difference]: Without dead ends: 361 [2022-02-15 01:12:10,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=2047, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:12:10,019 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:10,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 95 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-15 01:12:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 282. [2022-02-15 01:12:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 269 states have internal predecessors, (310), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 01:12:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2022-02-15 01:12:10,129 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 54 [2022-02-15 01:12:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:10,129 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2022-02-15 01:12:10,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2022-02-15 01:12:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:12:10,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:10,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:10,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:12:10,130 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 3 times [2022-02-15 01:12:10,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:10,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688902441] [2022-02-15 01:12:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:10,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:10,131 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:10,132 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 01:12:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:10,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:10,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688902441] [2022-02-15 01:12:10,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688902441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:10,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:10,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:10,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548510266] [2022-02-15 01:12:10,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:10,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:10,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:10,506 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:11,509 INFO L93 Difference]: Finished difference Result 316 states and 370 transitions. [2022-02-15 01:12:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:12:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-15 01:12:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:11,511 INFO L225 Difference]: With dead ends: 316 [2022-02-15 01:12:11,511 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 01:12:11,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:12:11,512 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:11,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 94 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 01:12:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-02-15 01:12:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 269 states have (on average 1.174721189591078) internal successors, (316), 275 states have internal predecessors, (316), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-15 01:12:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 338 transitions. [2022-02-15 01:12:11,631 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 338 transitions. Word has length 54 [2022-02-15 01:12:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:11,632 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 338 transitions. [2022-02-15 01:12:11,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 338 transitions. [2022-02-15 01:12:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:12:11,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:11,632 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:11,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:12:11,633 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2022-02-15 01:12:11,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:11,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222474682] [2022-02-15 01:12:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:11,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:11,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:11,635 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 01:12:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:12,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:12,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222474682] [2022-02-15 01:12:12,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222474682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:12,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:12,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:12:12,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837286589] [2022-02-15 01:12:12,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:12,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:12:12,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:12:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:12:12,247 INFO L87 Difference]: Start difference. First operand 288 states and 338 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:13,577 INFO L93 Difference]: Finished difference Result 327 states and 384 transitions. [2022-02-15 01:12:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:12:13,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-02-15 01:12:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:13,578 INFO L225 Difference]: With dead ends: 327 [2022-02-15 01:12:13,579 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 01:12:13,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=566, Invalid=3990, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:12:13,580 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 161 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:13,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 01:12:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 235. [2022-02-15 01:12:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 219 states have (on average 1.2009132420091324) internal successors, (263), 224 states have internal predecessors, (263), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 01:12:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2022-02-15 01:12:13,683 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 56 [2022-02-15 01:12:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:13,683 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2022-02-15 01:12:13,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2022-02-15 01:12:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:12:13,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:13,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:13,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:12:13,684 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2022-02-15 01:12:13,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:13,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707196790] [2022-02-15 01:12:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:13,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:13,685 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:13,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:13,686 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:12:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:13,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:13,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707196790] [2022-02-15 01:12:13,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707196790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:13,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:13,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:12:13,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771388] [2022-02-15 01:12:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:12:13,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:12:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:13,934 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:14,582 INFO L93 Difference]: Finished difference Result 318 states and 382 transitions. [2022-02-15 01:12:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:12:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-15 01:12:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:14,584 INFO L225 Difference]: With dead ends: 318 [2022-02-15 01:12:14,584 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 01:12:14,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:12:14,585 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:14,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 62 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 01:12:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 267. [2022-02-15 01:12:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 244 states have (on average 1.1885245901639345) internal successors, (290), 251 states have internal predecessors, (290), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:12:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2022-02-15 01:12:14,702 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 57 [2022-02-15 01:12:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2022-02-15 01:12:14,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2022-02-15 01:12:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:12:14,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:14,703 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:14,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:12:14,703 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 3 times [2022-02-15 01:12:14,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:14,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094968270] [2022-02-15 01:12:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:14,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:14,705 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:14,706 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:15,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:15,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094968270] [2022-02-15 01:12:15,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094968270] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:15,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:15,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:15,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713734161] [2022-02-15 01:12:15,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:15,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:15,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:15,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:15,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:15,115 INFO L87 Difference]: Start difference. First operand 267 states and 321 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:16,155 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2022-02-15 01:12:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:12:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:12:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:16,156 INFO L225 Difference]: With dead ends: 312 [2022-02-15 01:12:16,157 INFO L226 Difference]: Without dead ends: 310 [2022-02-15 01:12:16,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:12:16,157 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:16,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 77 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-15 01:12:16,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 271. [2022-02-15 01:12:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 254 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:12:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2022-02-15 01:12:16,276 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 56 [2022-02-15 01:12:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:16,276 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2022-02-15 01:12:16,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2022-02-15 01:12:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:12:16,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:16,277 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:16,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:12:16,277 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash 997874079, now seen corresponding path program 2 times [2022-02-15 01:12:16,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:16,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444465971] [2022-02-15 01:12:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:16,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:16,279 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:16,280 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:16,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:16,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:16,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444465971] [2022-02-15 01:12:16,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444465971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:16,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:16,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:12:16,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298311297] [2022-02-15 01:12:16,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:16,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:12:16,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:16,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:12:16,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:12:16,382 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:16,892 INFO L93 Difference]: Finished difference Result 587 states and 709 transitions. [2022-02-15 01:12:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:12:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-15 01:12:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:16,893 INFO L225 Difference]: With dead ends: 587 [2022-02-15 01:12:16,893 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 01:12:16,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:16,894 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 267 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:16,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 68 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 01:12:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 355. [2022-02-15 01:12:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 338 states have internal predecessors, (387), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:12:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 418 transitions. [2022-02-15 01:12:17,065 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 418 transitions. Word has length 57 [2022-02-15 01:12:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:17,065 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 418 transitions. [2022-02-15 01:12:17,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 418 transitions. [2022-02-15 01:12:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:17,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:17,066 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:17,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:12:17,066 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2022-02-15 01:12:17,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:17,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287070782] [2022-02-15 01:12:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:17,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:17,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:17,069 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-15 01:12:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:17,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:17,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287070782] [2022-02-15 01:12:17,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [287070782] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:17,333 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:17,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:12:17,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495358564] [2022-02-15 01:12:17,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:17,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:12:17,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:12:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:12:17,334 INFO L87 Difference]: Start difference. First operand 355 states and 418 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:18,766 INFO L93 Difference]: Finished difference Result 409 states and 481 transitions. [2022-02-15 01:12:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:12:18,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-15 01:12:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:18,768 INFO L225 Difference]: With dead ends: 409 [2022-02-15 01:12:18,768 INFO L226 Difference]: Without dead ends: 407 [2022-02-15 01:12:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=3359, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:12:18,769 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:18,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 98 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-15 01:12:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 364. [2022-02-15 01:12:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 339 states have (on average 1.168141592920354) internal successors, (396), 347 states have internal predecessors, (396), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 01:12:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 429 transitions. [2022-02-15 01:12:18,943 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 429 transitions. Word has length 59 [2022-02-15 01:12:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:18,943 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 429 transitions. [2022-02-15 01:12:18,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 429 transitions. [2022-02-15 01:12:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:18,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:18,944 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:18,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:12:18,944 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2022-02-15 01:12:18,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:18,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420851385] [2022-02-15 01:12:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:18,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:18,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:18,947 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-15 01:12:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:19,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:19,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420851385] [2022-02-15 01:12:19,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420851385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:19,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:19,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:12:19,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166703682] [2022-02-15 01:12:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:19,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:12:19,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:12:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:12:19,676 INFO L87 Difference]: Start difference. First operand 364 states and 429 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:21,430 INFO L93 Difference]: Finished difference Result 511 states and 600 transitions. [2022-02-15 01:12:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:12:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-15 01:12:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:21,432 INFO L225 Difference]: With dead ends: 511 [2022-02-15 01:12:21,432 INFO L226 Difference]: Without dead ends: 509 [2022-02-15 01:12:21,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=619, Invalid=4211, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:12:21,433 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 249 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:21,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 87 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-15 01:12:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 419. [2022-02-15 01:12:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 391 states have (on average 1.1611253196930946) internal successors, (454), 400 states have internal predecessors, (454), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:12:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 491 transitions. [2022-02-15 01:12:21,647 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 491 transitions. Word has length 59 [2022-02-15 01:12:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:21,647 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 491 transitions. [2022-02-15 01:12:21,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 491 transitions. [2022-02-15 01:12:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:21,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:21,648 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:21,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:12:21,648 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1033874973, now seen corresponding path program 3 times [2022-02-15 01:12:21,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:21,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863426718] [2022-02-15 01:12:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:21,650 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:21,650 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:21,651 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:22,012 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:22,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863426718] [2022-02-15 01:12:22,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863426718] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:22,012 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:22,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:22,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172901770] [2022-02-15 01:12:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:22,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:22,013 INFO L87 Difference]: Start difference. First operand 419 states and 491 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:23,709 INFO L93 Difference]: Finished difference Result 572 states and 677 transitions. [2022-02-15 01:12:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:12:23,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 59 [2022-02-15 01:12:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:23,711 INFO L225 Difference]: With dead ends: 572 [2022-02-15 01:12:23,711 INFO L226 Difference]: Without dead ends: 570 [2022-02-15 01:12:23,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=719, Invalid=3441, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:12:23,712 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 217 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:23,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 97 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-15 01:12:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 485. [2022-02-15 01:12:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 454 states have (on average 1.171806167400881) internal successors, (532), 465 states have internal predecessors, (532), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 9 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-15 01:12:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 573 transitions. [2022-02-15 01:12:23,969 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 573 transitions. Word has length 59 [2022-02-15 01:12:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:23,970 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 573 transitions. [2022-02-15 01:12:23,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 573 transitions. [2022-02-15 01:12:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:23,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,971 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:12:23,971 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1495218077, now seen corresponding path program 4 times [2022-02-15 01:12:23,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527073728] [2022-02-15 01:12:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:23,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:23,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:23,973 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:24,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:24,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527073728] [2022-02-15 01:12:24,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527073728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:24,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:24,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:12:24,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646931777] [2022-02-15 01:12:24,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:12:24,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:12:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:12:24,659 INFO L87 Difference]: Start difference. First operand 485 states and 573 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:26,304 INFO L93 Difference]: Finished difference Result 592 states and 702 transitions. [2022-02-15 01:12:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:12:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 [2022-02-15 01:12:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:26,306 INFO L225 Difference]: With dead ends: 592 [2022-02-15 01:12:26,306 INFO L226 Difference]: Without dead ends: 590 [2022-02-15 01:12:26,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=684, Invalid=3476, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:12:26,307 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 273 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:26,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 106 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-15 01:12:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 499. [2022-02-15 01:12:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 469 states have (on average 1.1769722814498933) internal successors, (552), 479 states have internal predecessors, (552), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 591 transitions. [2022-02-15 01:12:26,579 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 591 transitions. Word has length 59 [2022-02-15 01:12:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:26,579 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 591 transitions. [2022-02-15 01:12:26,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 591 transitions. [2022-02-15 01:12:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:26,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:26,580 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:26,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:12:26,580 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -989126035, now seen corresponding path program 6 times [2022-02-15 01:12:26,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:26,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447233177] [2022-02-15 01:12:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:26,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:26,582 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:26,583 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:27,185 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447233177] [2022-02-15 01:12:27,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [447233177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:27,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:27,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:12:27,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264926527] [2022-02-15 01:12:27,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:27,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:12:27,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:27,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:12:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:12:27,187 INFO L87 Difference]: Start difference. First operand 499 states and 591 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:29,098 INFO L93 Difference]: Finished difference Result 729 states and 867 transitions. [2022-02-15 01:12:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:12:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2022-02-15 01:12:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:29,101 INFO L225 Difference]: With dead ends: 729 [2022-02-15 01:12:29,101 INFO L226 Difference]: Without dead ends: 727 [2022-02-15 01:12:29,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=625, Invalid=4345, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:12:29,102 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 340 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:29,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 99 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-15 01:12:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 503. [2022-02-15 01:12:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 472 states have (on average 1.1758474576271187) internal successors, (555), 482 states have internal predecessors, (555), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 594 transitions. [2022-02-15 01:12:29,379 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 594 transitions. Word has length 59 [2022-02-15 01:12:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:29,379 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 594 transitions. [2022-02-15 01:12:29,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 594 transitions. [2022-02-15 01:12:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:29,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:29,381 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:29,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:12:29,381 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 4 times [2022-02-15 01:12:29,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:29,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625074096] [2022-02-15 01:12:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:29,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:29,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:29,383 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:29,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:29,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625074096] [2022-02-15 01:12:29,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625074096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:29,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:29,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:12:29,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137969545] [2022-02-15 01:12:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:12:29,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:12:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:29,893 INFO L87 Difference]: Start difference. First operand 503 states and 594 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:31,022 INFO L93 Difference]: Finished difference Result 595 states and 703 transitions. [2022-02-15 01:12:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:12:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 59 [2022-02-15 01:12:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:31,024 INFO L225 Difference]: With dead ends: 595 [2022-02-15 01:12:31,024 INFO L226 Difference]: Without dead ends: 593 [2022-02-15 01:12:31,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:12:31,025 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:31,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 64 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-15 01:12:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 533. [2022-02-15 01:12:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 499 states have (on average 1.1743486973947896) internal successors, (586), 511 states have internal predecessors, (586), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 9 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:12:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 629 transitions. [2022-02-15 01:12:31,333 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 629 transitions. Word has length 59 [2022-02-15 01:12:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:31,333 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 629 transitions. [2022-02-15 01:12:31,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 629 transitions. [2022-02-15 01:12:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:31,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:31,334 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:31,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:12:31,335 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash -715377509, now seen corresponding path program 5 times [2022-02-15 01:12:31,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:31,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558770902] [2022-02-15 01:12:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:31,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:31,336 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:31,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:31,337 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:31,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:31,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558770902] [2022-02-15 01:12:31,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558770902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:31,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:31,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:31,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169870440] [2022-02-15 01:12:31,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:31,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:31,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:31,873 INFO L87 Difference]: Start difference. First operand 533 states and 629 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:33,198 INFO L93 Difference]: Finished difference Result 619 states and 730 transitions. [2022-02-15 01:12:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 59 [2022-02-15 01:12:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:33,200 INFO L225 Difference]: With dead ends: 619 [2022-02-15 01:12:33,200 INFO L226 Difference]: Without dead ends: 617 [2022-02-15 01:12:33,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:12:33,201 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 199 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:33,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-15 01:12:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 525. [2022-02-15 01:12:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 491 states have (on average 1.1731160896130346) internal successors, (576), 503 states have internal predecessors, (576), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 9 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:12:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 619 transitions. [2022-02-15 01:12:33,491 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 619 transitions. Word has length 59 [2022-02-15 01:12:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:33,492 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 619 transitions. [2022-02-15 01:12:33,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 619 transitions. [2022-02-15 01:12:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:12:33,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:33,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:33,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:12:33,493 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2022-02-15 01:12:33,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:33,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765268102] [2022-02-15 01:12:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:33,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:33,494 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:33,495 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 01:12:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:12:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:33,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:33,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765268102] [2022-02-15 01:12:33,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765268102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:33,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:33,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:12:33,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420951039] [2022-02-15 01:12:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:33,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:12:33,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:12:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:33,814 INFO L87 Difference]: Start difference. First operand 525 states and 619 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:34,847 INFO L93 Difference]: Finished difference Result 591 states and 697 transitions. [2022-02-15 01:12:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:12:34,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-02-15 01:12:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:34,849 INFO L225 Difference]: With dead ends: 591 [2022-02-15 01:12:34,849 INFO L226 Difference]: Without dead ends: 589 [2022-02-15 01:12:34,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:12:34,850 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 199 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:34,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 78 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-15 01:12:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 523. [2022-02-15 01:12:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 489 states have (on average 1.1738241308793456) internal successors, (574), 502 states have internal predecessors, (574), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 8 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:12:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 617 transitions. [2022-02-15 01:12:35,147 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 617 transitions. Word has length 62 [2022-02-15 01:12:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:35,147 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 617 transitions. [2022-02-15 01:12:35,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 617 transitions. [2022-02-15 01:12:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:12:35,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:35,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:35,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:12:35,149 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2022-02-15 01:12:35,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:35,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750326925] [2022-02-15 01:12:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:35,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:35,150 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:35,151 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:12:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:35,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:35,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750326925] [2022-02-15 01:12:35,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [750326925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:35,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:35,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:35,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285047638] [2022-02-15 01:12:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:35,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:35,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:35,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:35,599 INFO L87 Difference]: Start difference. First operand 523 states and 617 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:37,076 INFO L93 Difference]: Finished difference Result 743 states and 883 transitions. [2022-02-15 01:12:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:12:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-15 01:12:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:37,079 INFO L225 Difference]: With dead ends: 743 [2022-02-15 01:12:37,079 INFO L226 Difference]: Without dead ends: 681 [2022-02-15 01:12:37,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=3121, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:12:37,079 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 286 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:37,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 65 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-02-15 01:12:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 556. [2022-02-15 01:12:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 520 states have (on average 1.1788461538461539) internal successors, (613), 534 states have internal predecessors, (613), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (23), 9 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:12:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 660 transitions. [2022-02-15 01:12:37,404 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 660 transitions. Word has length 62 [2022-02-15 01:12:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:37,404 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 660 transitions. [2022-02-15 01:12:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 660 transitions. [2022-02-15 01:12:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:12:37,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:37,409 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:37,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:12:37,409 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2022-02-15 01:12:37,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:37,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812688695] [2022-02-15 01:12:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:37,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:37,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:37,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:37,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:12:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:37,685 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:37,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812688695] [2022-02-15 01:12:37,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [812688695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:37,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:37,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:37,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179136478] [2022-02-15 01:12:37,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:37,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:37,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:37,686 INFO L87 Difference]: Start difference. First operand 556 states and 660 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:39,051 INFO L93 Difference]: Finished difference Result 671 states and 799 transitions. [2022-02-15 01:12:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:12:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-15 01:12:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:39,054 INFO L225 Difference]: With dead ends: 671 [2022-02-15 01:12:39,054 INFO L226 Difference]: Without dead ends: 669 [2022-02-15 01:12:39,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:12:39,055 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 181 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:39,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 96 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-15 01:12:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 577. [2022-02-15 01:12:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 540 states have (on average 1.1814814814814816) internal successors, (638), 555 states have internal predecessors, (638), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 9 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 01:12:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 687 transitions. [2022-02-15 01:12:39,394 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 687 transitions. Word has length 62 [2022-02-15 01:12:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:39,395 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 687 transitions. [2022-02-15 01:12:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 687 transitions. [2022-02-15 01:12:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:12:39,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:39,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:39,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:12:39,396 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1980682524, now seen corresponding path program 4 times [2022-02-15 01:12:39,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:39,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086205952] [2022-02-15 01:12:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:39,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:39,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:39,398 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:12:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:39,924 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:39,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086205952] [2022-02-15 01:12:39,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086205952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:39,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:39,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:39,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083367973] [2022-02-15 01:12:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:39,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:39,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:39,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:39,925 INFO L87 Difference]: Start difference. First operand 577 states and 687 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:41,568 INFO L93 Difference]: Finished difference Result 773 states and 924 transitions. [2022-02-15 01:12:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:12:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-15 01:12:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:41,570 INFO L225 Difference]: With dead ends: 773 [2022-02-15 01:12:41,570 INFO L226 Difference]: Without dead ends: 771 [2022-02-15 01:12:41,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:12:41,571 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 286 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:41,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 69 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-15 01:12:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 574. [2022-02-15 01:12:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 537 states have (on average 1.1824953445065176) internal successors, (635), 552 states have internal predecessors, (635), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 9 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 01:12:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 684 transitions. [2022-02-15 01:12:41,918 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 684 transitions. Word has length 62 [2022-02-15 01:12:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 684 transitions. [2022-02-15 01:12:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 684 transitions. [2022-02-15 01:12:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:12:41,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:41,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:41,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:12:41,920 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2022-02-15 01:12:41,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:41,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678775168] [2022-02-15 01:12:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:41,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:41,922 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:41,923 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:12:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:12:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:42,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:42,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678775168] [2022-02-15 01:12:42,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [678775168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:42,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:42,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:12:42,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910018363] [2022-02-15 01:12:42,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:42,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:12:42,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:12:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:12:42,039 INFO L87 Difference]: Start difference. First operand 574 states and 684 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:12:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:42,876 INFO L93 Difference]: Finished difference Result 738 states and 882 transitions. [2022-02-15 01:12:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:12:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-15 01:12:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:42,878 INFO L225 Difference]: With dead ends: 738 [2022-02-15 01:12:42,878 INFO L226 Difference]: Without dead ends: 675 [2022-02-15 01:12:42,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:42,878 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 208 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:42,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 81 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-15 01:12:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 552. [2022-02-15 01:12:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 518 states have (on average 1.1718146718146718) internal successors, (607), 532 states have internal predecessors, (607), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 9 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:12:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 653 transitions. [2022-02-15 01:12:43,219 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 653 transitions. Word has length 65 [2022-02-15 01:12:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:43,219 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 653 transitions. [2022-02-15 01:12:43,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:12:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 653 transitions. [2022-02-15 01:12:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:12:43,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:43,220 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:43,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:12:43,220 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2022-02-15 01:12:43,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:43,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441580459] [2022-02-15 01:12:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:43,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:43,222 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:43,223 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:43,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:12:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:44,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:44,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441580459] [2022-02-15 01:12:44,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [441580459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:44,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:44,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:12:44,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206148862] [2022-02-15 01:12:44,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:44,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:12:44,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:12:44,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:12:44,007 INFO L87 Difference]: Start difference. First operand 552 states and 653 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:48,451 INFO L93 Difference]: Finished difference Result 932 states and 1119 transitions. [2022-02-15 01:12:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:12:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 01:12:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:48,454 INFO L225 Difference]: With dead ends: 932 [2022-02-15 01:12:48,454 INFO L226 Difference]: Without dead ends: 930 [2022-02-15 01:12:48,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1640, Invalid=9280, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:12:48,455 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 472 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:48,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 115 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:12:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-15 01:12:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 722. [2022-02-15 01:12:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 681 states have (on average 1.183553597650514) internal successors, (806), 699 states have internal predecessors, (806), 30 states have call successors, (30), 11 states have call predecessors, (30), 10 states have return successors, (28), 11 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-15 01:12:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 864 transitions. [2022-02-15 01:12:48,945 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 864 transitions. Word has length 64 [2022-02-15 01:12:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:48,945 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 864 transitions. [2022-02-15 01:12:48,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 864 transitions. [2022-02-15 01:12:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:12:48,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:48,947 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:12:48,947 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash 968751897, now seen corresponding path program 4 times [2022-02-15 01:12:48,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:48,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308522386] [2022-02-15 01:12:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:48,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:48,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:48,949 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:12:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:49,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:49,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308522386] [2022-02-15 01:12:49,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308522386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:49,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:49,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:12:49,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049084168] [2022-02-15 01:12:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:49,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:12:49,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:12:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:12:49,721 INFO L87 Difference]: Start difference. First operand 722 states and 864 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:51,939 INFO L93 Difference]: Finished difference Result 772 states and 919 transitions. [2022-02-15 01:12:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:12:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 01:12:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:51,941 INFO L225 Difference]: With dead ends: 772 [2022-02-15 01:12:51,941 INFO L226 Difference]: Without dead ends: 752 [2022-02-15 01:12:51,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=690, Invalid=5162, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:12:51,942 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:51,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 108 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-15 01:12:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 696. [2022-02-15 01:12:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 657 states have (on average 1.1856925418569255) internal successors, (779), 674 states have internal predecessors, (779), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 01:12:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 835 transitions. [2022-02-15 01:12:52,415 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 835 transitions. Word has length 64 [2022-02-15 01:12:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:52,416 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 835 transitions. [2022-02-15 01:12:52,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 835 transitions. [2022-02-15 01:12:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:12:52,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:52,417 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:52,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:12:52,417 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2022-02-15 01:12:52,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:52,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242031458] [2022-02-15 01:12:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:52,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:52,418 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:52,419 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:52,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:12:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:52,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:12:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:52,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:52,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242031458] [2022-02-15 01:12:52,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [242031458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:52,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:52,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:52,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489256981] [2022-02-15 01:12:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:52,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:52,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:52,848 INFO L87 Difference]: Start difference. First operand 696 states and 835 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:54,344 INFO L93 Difference]: Finished difference Result 944 states and 1141 transitions. [2022-02-15 01:12:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:12:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-15 01:12:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:54,347 INFO L225 Difference]: With dead ends: 944 [2022-02-15 01:12:54,347 INFO L226 Difference]: Without dead ends: 942 [2022-02-15 01:12:54,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:12:54,348 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 318 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:54,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 95 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-02-15 01:12:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 723. [2022-02-15 01:12:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 676 states have (on average 1.180473372781065) internal successors, (798), 696 states have internal predecessors, (798), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 15 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-15 01:12:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 868 transitions. [2022-02-15 01:12:54,863 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 868 transitions. Word has length 65 [2022-02-15 01:12:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:54,864 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 868 transitions. [2022-02-15 01:12:54,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 868 transitions. [2022-02-15 01:12:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:12:54,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:54,865 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:54,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:12:54,865 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 5 times [2022-02-15 01:12:54,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:54,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518005798] [2022-02-15 01:12:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:54,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:54,866 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:54,867 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:55,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:55,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:55,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518005798] [2022-02-15 01:12:55,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [518005798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:55,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:55,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:55,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145927727] [2022-02-15 01:12:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:55,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:55,494 INFO L87 Difference]: Start difference. First operand 723 states and 868 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:57,122 INFO L93 Difference]: Finished difference Result 918 states and 1109 transitions. [2022-02-15 01:12:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:12:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:12:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:57,124 INFO L225 Difference]: With dead ends: 918 [2022-02-15 01:12:57,124 INFO L226 Difference]: Without dead ends: 798 [2022-02-15 01:12:57,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:12:57,125 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:57,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 67 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-02-15 01:12:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 747. [2022-02-15 01:12:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 700 states have (on average 1.1785714285714286) internal successors, (825), 720 states have internal predecessors, (825), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 15 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-15 01:12:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 895 transitions. [2022-02-15 01:12:57,676 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 895 transitions. Word has length 64 [2022-02-15 01:12:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:57,676 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 895 transitions. [2022-02-15 01:12:57,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 895 transitions. [2022-02-15 01:12:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:12:57,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:57,677 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:12:57,677 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2022-02-15 01:12:57,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:57,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143790660] [2022-02-15 01:12:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:57,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:57,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:57,680 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:58,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:58,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143790660] [2022-02-15 01:12:58,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143790660] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:58,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:58,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:58,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35793828] [2022-02-15 01:12:58,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:58,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:58,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:58,135 INFO L87 Difference]: Start difference. First operand 747 states and 895 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) 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) [2022-02-15 01:13:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:00,787 INFO L93 Difference]: Finished difference Result 982 states and 1180 transitions. [2022-02-15 01:13:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:13:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) 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 64 [2022-02-15 01:13:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:00,790 INFO L225 Difference]: With dead ends: 982 [2022-02-15 01:13:00,790 INFO L226 Difference]: Without dead ends: 980 [2022-02-15 01:13:00,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=889, Invalid=5431, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:13:00,791 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:00,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 103 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:13:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-02-15 01:13:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 767. [2022-02-15 01:13:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 716 states have (on average 1.1773743016759777) internal successors, (843), 738 states have internal predecessors, (843), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 15 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-15 01:13:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 917 transitions. [2022-02-15 01:13:01,344 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 917 transitions. Word has length 64 [2022-02-15 01:13:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 917 transitions. [2022-02-15 01:13:01,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) 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) [2022-02-15 01:13:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 917 transitions. [2022-02-15 01:13:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:13:01,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:01,346 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:01,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:13:01,346 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333674, now seen corresponding path program 6 times [2022-02-15 01:13:01,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:01,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159781049] [2022-02-15 01:13:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:01,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:01,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:01,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:01,348 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:02,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:02,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159781049] [2022-02-15 01:13:02,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [159781049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:02,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:02,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:13:02,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21350460] [2022-02-15 01:13:02,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:02,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:13:02,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:13:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:13:02,041 INFO L87 Difference]: Start difference. First operand 767 states and 917 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:04,595 INFO L93 Difference]: Finished difference Result 1189 states and 1436 transitions. [2022-02-15 01:13:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:13:04,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:13:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:04,598 INFO L225 Difference]: With dead ends: 1189 [2022-02-15 01:13:04,598 INFO L226 Difference]: Without dead ends: 973 [2022-02-15 01:13:04,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=906, Invalid=4794, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:13:04,599 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 280 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:04,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 112 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-02-15 01:13:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 799. [2022-02-15 01:13:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 748 states have (on average 1.1818181818181819) internal successors, (884), 770 states have internal predecessors, (884), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 15 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-15 01:13:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 958 transitions. [2022-02-15 01:13:05,186 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 958 transitions. Word has length 64 [2022-02-15 01:13:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:05,186 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 958 transitions. [2022-02-15 01:13:05,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 958 transitions. [2022-02-15 01:13:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:13:05,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:05,188 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:05,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:13:05,188 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2022-02-15 01:13:05,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:05,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511815473] [2022-02-15 01:13:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:05,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:05,189 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:05,190 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:05,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:05,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511815473] [2022-02-15 01:13:05,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [511815473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:05,844 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:05,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:13:05,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744737837] [2022-02-15 01:13:05,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:05,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:13:05,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:13:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:13:05,845 INFO L87 Difference]: Start difference. First operand 799 states and 958 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:08,101 INFO L93 Difference]: Finished difference Result 1048 states and 1258 transitions. [2022-02-15 01:13:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:13:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:13:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:08,104 INFO L225 Difference]: With dead ends: 1048 [2022-02-15 01:13:08,104 INFO L226 Difference]: Without dead ends: 908 [2022-02-15 01:13:08,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=4022, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:13:08,105 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 178 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:08,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 123 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:13:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-02-15 01:13:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 826. [2022-02-15 01:13:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 772 states have (on average 1.182642487046632) internal successors, (913), 796 states have internal predecessors, (913), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (38), 15 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-15 01:13:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 991 transitions. [2022-02-15 01:13:08,721 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 991 transitions. Word has length 64 [2022-02-15 01:13:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:08,721 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 991 transitions. [2022-02-15 01:13:08,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 991 transitions. [2022-02-15 01:13:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:13:08,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:08,723 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:08,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:13:08,723 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1363947086, now seen corresponding path program 8 times [2022-02-15 01:13:08,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:08,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837249809] [2022-02-15 01:13:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:08,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:08,724 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:08,725 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:09,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:09,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837249809] [2022-02-15 01:13:09,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837249809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:09,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:09,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:13:09,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025837857] [2022-02-15 01:13:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:09,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:13:09,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:13:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:13:09,173 INFO L87 Difference]: Start difference. First operand 826 states and 991 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:10,706 INFO L93 Difference]: Finished difference Result 984 states and 1181 transitions. [2022-02-15 01:13:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:13:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:13:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:10,709 INFO L225 Difference]: With dead ends: 984 [2022-02-15 01:13:10,709 INFO L226 Difference]: Without dead ends: 982 [2022-02-15 01:13:10,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:13:10,710 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:10,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-15 01:13:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 880. [2022-02-15 01:13:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 823 states have (on average 1.1871202916160388) internal successors, (977), 849 states have internal predecessors, (977), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-15 01:13:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1059 transitions. [2022-02-15 01:13:11,379 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1059 transitions. Word has length 64 [2022-02-15 01:13:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:11,380 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1059 transitions. [2022-02-15 01:13:11,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1059 transitions. [2022-02-15 01:13:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:13:11,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:11,381 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:11,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:13:11,381 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:11,382 INFO L85 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2022-02-15 01:13:11,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:11,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907066441] [2022-02-15 01:13:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:11,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:11,396 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:11,397 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:13:11,419 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 01:13:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:13:11,464 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 01:13:11,464 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 01:13:11,466 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:13:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:13:11,469 INFO L732 BasicCegarLoop]: Path program histogram: [8, 7, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2022-02-15 01:13:11,471 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:13:11,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:13:11 BoogieIcfgContainer [2022-02-15 01:13:11,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:13:11,489 INFO L158 Benchmark]: Toolchain (without parser) took 86905.01ms. Allocated memory was 200.3MB in the beginning and 595.6MB in the end (delta: 395.3MB). Free memory was 150.7MB in the beginning and 293.6MB in the end (delta: -142.9MB). Peak memory consumption was 253.3MB. Max. memory is 8.0GB. [2022-02-15 01:13:11,489 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 200.3MB. Free memory was 167.5MB in the beginning and 167.5MB in the end (delta: 71.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:13:11,489 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.36ms. Allocated memory is still 200.3MB. Free memory was 150.5MB in the beginning and 176.8MB in the end (delta: -26.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-15 01:13:11,489 INFO L158 Benchmark]: Boogie Preprocessor took 44.23ms. Allocated memory is still 200.3MB. Free memory was 176.8MB in the beginning and 175.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 01:13:11,489 INFO L158 Benchmark]: RCFGBuilder took 234.08ms. Allocated memory is still 200.3MB. Free memory was 174.7MB in the beginning and 163.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 01:13:11,490 INFO L158 Benchmark]: TraceAbstraction took 86403.69ms. Allocated memory was 200.3MB in the beginning and 595.6MB in the end (delta: 395.3MB). Free memory was 162.7MB in the beginning and 293.6MB in the end (delta: -130.9MB). Peak memory consumption was 264.9MB. Max. memory is 8.0GB. [2022-02-15 01:13:11,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 200.3MB. Free memory was 167.5MB in the beginning and 167.5MB in the end (delta: 71.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.36ms. Allocated memory is still 200.3MB. Free memory was 150.5MB in the beginning and 176.8MB in the end (delta: -26.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.23ms. Allocated memory is still 200.3MB. Free memory was 176.8MB in the beginning and 175.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 234.08ms. Allocated memory is still 200.3MB. Free memory was 174.7MB in the beginning and 163.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 86403.69ms. Allocated memory was 200.3MB in the beginning and 595.6MB in the end (delta: 395.3MB). Free memory was 162.7MB in the beginning and 293.6MB in the end (delta: -130.9MB). Peak memory consumption was 264.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j