/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:13:24,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:13:24,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:13:24,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:13:24,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:13:24,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:13:24,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:13:24,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:13:24,885 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:13:24,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:13:24,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:13:24,886 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:13:24,887 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:13:25,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:13:25,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:13:25,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:13:25,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:13:25,098 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:13:25,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-02-15 01:13:25,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d8b2825/ff1fe50628634fe38338fceeb2083838/FLAG4948d73bf [2022-02-15 01:13:25,457 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:13:25,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-02-15 01:13:25,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d8b2825/ff1fe50628634fe38338fceeb2083838/FLAG4948d73bf [2022-02-15 01:13:25,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d8b2825/ff1fe50628634fe38338fceeb2083838 [2022-02-15 01:13:25,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:13:25,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:13:25,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:13:25,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:13:25,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:13:25,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f58df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25, skipping insertion in model container [2022-02-15 01:13:25,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:13:25,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:13:26,022 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-15 01:13:26,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:13:26,057 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:13:26,066 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-15 01:13:26,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:13:26,097 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:13:26,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26 WrapperNode [2022-02-15 01:13:26,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:13:26,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:13:26,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:13:26,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:13:26,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:13:26,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:13:26,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:13:26,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:13:26,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (1/1) ... [2022-02-15 01:13:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:13:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:13:26,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:13:26,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:13:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:13:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:13:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:13:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:13:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:13:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:13:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:13:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:13:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:13:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:13:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:13:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:13:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 01:13:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:13:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:13:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:13:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:13:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:13:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:13:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:13:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:13:26,263 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:13:26,264 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:13:26,372 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:13:26,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:13:26,377 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-15 01:13:26,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:13:26 BoogieIcfgContainer [2022-02-15 01:13:26,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:13:26,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:13:26,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:13:26,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:13:26,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:13:25" (1/3) ... [2022-02-15 01:13:26,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10590c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:13:26, skipping insertion in model container [2022-02-15 01:13:26,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:26" (2/3) ... [2022-02-15 01:13:26,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10590c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:13:26, skipping insertion in model container [2022-02-15 01:13:26,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:13:26" (3/3) ... [2022-02-15 01:13:26,386 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-02-15 01:13:26,389 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:13:26,389 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:13:26,418 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:13:26,422 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:13:26,423 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:13:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:13:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:13:26,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,452 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 01:13:26,453 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-02-15 01:13:26,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301865151] [2022-02-15 01:13:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:26,540 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:26,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:26,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301865151] [2022-02-15 01:13:26,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [301865151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:26,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:26,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:13:26,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291010943] [2022-02-15 01:13:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:13:26,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:13:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:13:26,755 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 01:13:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,807 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-02-15 01:13:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:13:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 01:13:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,816 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:13:26,817 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 01:13:26,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:13:26,824 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 01:13:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-15 01:13:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-02-15 01:13:26,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-02-15 01:13:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,859 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-02-15 01:13:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 01:13:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-02-15 01:13:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:13:26,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:13:26,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-02-15 01:13:26,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654102049] [2022-02-15 01:13:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:26,871 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:26,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:26,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654102049] [2022-02-15 01:13:26,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [654102049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:26,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:26,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:13:26,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332256041] [2022-02-15 01:13:26,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:26,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:13:26,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:26,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:13:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:13:26,992 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:27,094 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-02-15 01:13:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:13:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:13:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:27,097 INFO L225 Difference]: With dead ends: 65 [2022-02-15 01:13:27,097 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 01:13:27,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:27,102 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:27,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 01:13:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-02-15 01:13:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-15 01:13:27,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-02-15 01:13:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,115 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-15 01:13:27,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-15 01:13:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 01:13:27,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:27,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:13:27,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-02-15 01:13:27,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434445799] [2022-02-15 01:13:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,136 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,137 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434445799] [2022-02-15 01:13:27,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434445799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:13:27,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374396223] [2022-02-15 01:13:27,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:13:27,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:13:27,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:27,252 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:27,400 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2022-02-15 01:13:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:13:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-15 01:13:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:27,403 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:13:27,403 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 01:13:27,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:27,409 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 01:13:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2022-02-15 01:13:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-15 01:13:27,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2022-02-15 01:13:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,424 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-15 01:13:27,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-15 01:13:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:13:27,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,424 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] [2022-02-15 01:13:27,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:13:27,425 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2022-02-15 01:13:27,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438726528] [2022-02-15 01:13:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,433 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,435 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438726528] [2022-02-15 01:13:27,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438726528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,530 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:13:27,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074934683] [2022-02-15 01:13:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:13:27,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:13:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:13:27,532 INFO L87 Difference]: Start difference. First operand 32 states and 39 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 01:13:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:27,693 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-02-15 01:13:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:13:27,694 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 23 [2022-02-15 01:13:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:27,696 INFO L225 Difference]: With dead ends: 95 [2022-02-15 01:13:27,696 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:13:27,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:27,701 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:27,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 46 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:13:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2022-02-15 01:13:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-15 01:13:27,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-02-15 01:13:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,716 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-15 01:13:27,716 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 01:13:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-15 01:13:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:13:27,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:13:27,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2022-02-15 01:13:27,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789169931] [2022-02-15 01:13:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,734 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789169931] [2022-02-15 01:13:27,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789169931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:27,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522443270] [2022-02-15 01:13:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:27,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:27,884 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 01:13:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,077 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-02-15 01:13:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 01:13:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,079 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:13:28,079 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 01:13:28,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:28,079 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 01:13:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-02-15 01:13:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-15 01:13:28,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-02-15 01:13:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-15 01:13:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 01:13:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-15 01:13:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:13:28,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,089 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:13:28,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2022-02-15 01:13:28,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144457767] [2022-02-15 01:13:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,092 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,093 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:28,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144457767] [2022-02-15 01:13:28,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144457767] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:13:28,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246593943] [2022-02-15 01:13:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:13:28,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:13:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:13:28,198 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,451 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2022-02-15 01:13:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 01:13:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,453 INFO L225 Difference]: With dead ends: 125 [2022-02-15 01:13:28,453 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:13:28,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:28,454 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 75 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:13:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2022-02-15 01:13:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-02-15 01:13:28,462 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2022-02-15 01:13:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,463 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-02-15 01:13:28,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-02-15 01:13:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:13:28,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,464 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:13:28,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2022-02-15 01:13:28,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273473342] [2022-02-15 01:13:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,466 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,467 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:28,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273473342] [2022-02-15 01:13:28,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1273473342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:28,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488004977] [2022-02-15 01:13:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:28,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:28,576 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,897 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-02-15 01:13:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:13:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,914 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:13:28,915 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 01:13:28,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:28,916 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 01:13:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2022-02-15 01:13:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-02-15 01:13:28,927 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2022-02-15 01:13:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,927 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-02-15 01:13:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-02-15 01:13:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:13:28,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:13:28,934 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2022-02-15 01:13:28,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225294712] [2022-02-15 01:13:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,940 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:29,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:29,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225294712] [2022-02-15 01:13:29,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225294712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:29,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:29,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:29,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946584607] [2022-02-15 01:13:29,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:29,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:29,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:29,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:29,043 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:29,457 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-02-15 01:13:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:13:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 01:13:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:29,458 INFO L225 Difference]: With dead ends: 155 [2022-02-15 01:13:29,458 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:13:29,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:13:29,459 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:29,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:13:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2022-02-15 01:13:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-02-15 01:13:29,466 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2022-02-15 01:13:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:29,467 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-02-15 01:13:29,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-02-15 01:13:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:13:29,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:29,467 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:29,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:13:29,467 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2022-02-15 01:13:29,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:29,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645838952] [2022-02-15 01:13:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:29,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:29,470 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:29,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:29,470 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:29,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:29,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645838952] [2022-02-15 01:13:29,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645838952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:29,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:29,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:13:29,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790953667] [2022-02-15 01:13:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:13:29,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:13:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:29,586 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:30,102 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2022-02-15 01:13:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:13:30,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 01:13:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:30,103 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:13:30,103 INFO L226 Difference]: Without dead ends: 149 [2022-02-15 01:13:30,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:13:30,105 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:30,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 116 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-15 01:13:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2022-02-15 01:13:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-15 01:13:30,113 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-02-15 01:13:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:30,113 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-15 01:13:30,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-15 01:13:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:13:30,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:30,114 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:30,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:13:30,114 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2022-02-15 01:13:30,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:30,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948452809] [2022-02-15 01:13:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:30,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:30,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:30,119 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:30,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:30,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948452809] [2022-02-15 01:13:30,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948452809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:30,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:30,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:13:30,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276956178] [2022-02-15 01:13:30,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:13:30,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:13:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:30,266 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:30,950 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2022-02-15 01:13:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:13:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:13:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:30,951 INFO L225 Difference]: With dead ends: 185 [2022-02-15 01:13:30,951 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:13:30,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:30,952 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:30,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:13:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2022-02-15 01:13:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-02-15 01:13:30,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2022-02-15 01:13:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:30,962 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-02-15 01:13:30,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-02-15 01:13:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:13:30,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:30,962 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:30,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:13:30,963 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2022-02-15 01:13:30,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:30,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562620139] [2022-02-15 01:13:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:30,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:30,965 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:30,966 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:31,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:31,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562620139] [2022-02-15 01:13:31,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562620139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:31,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:31,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:13:31,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091441567] [2022-02-15 01:13:31,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:31,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:13:31,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:13:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:31,087 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:31,891 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-02-15 01:13:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:13:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 01:13:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:31,892 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:13:31,892 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 01:13:31,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:13:31,893 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:31,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 175 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:13:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 01:13:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2022-02-15 01:13:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-15 01:13:31,903 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2022-02-15 01:13:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:31,903 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-15 01:13:31,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-15 01:13:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:13:31,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:31,904 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:31,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:13:31,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2022-02-15 01:13:31,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:31,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800032821] [2022-02-15 01:13:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:31,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:31,907 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:31,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:31,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800032821] [2022-02-15 01:13:31,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800032821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:31,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:31,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:31,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381457959] [2022-02-15 01:13:31,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:31,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:31,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:31,996 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,105 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-15 01:13:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 01:13:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,106 INFO L225 Difference]: With dead ends: 72 [2022-02-15 01:13:32,106 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 01:13:32,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:32,107 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 01:13:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-02-15 01:13:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-02-15 01:13:32,125 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2022-02-15 01:13:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,125 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-02-15 01:13:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-02-15 01:13:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 01:13:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,126 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:13:32,126 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2022-02-15 01:13:32,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889559448] [2022-02-15 01:13:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,128 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,129 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889559448] [2022-02-15 01:13:32,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889559448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:13:32,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552500592] [2022-02-15 01:13:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:13:32,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:13:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:32,172 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,250 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-02-15 01:13:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:13:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-15 01:13:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,250 INFO L225 Difference]: With dead ends: 113 [2022-02-15 01:13:32,251 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 01:13:32,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:32,251 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 01:13:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-02-15 01:13:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-02-15 01:13:32,274 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2022-02-15 01:13:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,275 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-02-15 01:13:32,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-02-15 01:13:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:13:32,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,275 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:13:32,275 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2022-02-15 01:13:32,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146149505] [2022-02-15 01:13:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,277 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,278 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146149505] [2022-02-15 01:13:32,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146149505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:13:32,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984019315] [2022-02-15 01:13:32,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:13:32,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:13:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:13:32,350 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,458 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-02-15 01:13:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:13:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 48 [2022-02-15 01:13:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,460 INFO L225 Difference]: With dead ends: 141 [2022-02-15 01:13:32,460 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 01:13:32,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:32,460 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 01:13:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-02-15 01:13:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-02-15 01:13:32,493 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2022-02-15 01:13:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,494 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-02-15 01:13:32,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-02-15 01:13:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:32,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,495 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:13:32,495 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2022-02-15 01:13:32,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450737962] [2022-02-15 01:13:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,497 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,498 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,568 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450737962] [2022-02-15 01:13:32,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450737962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:32,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663832397] [2022-02-15 01:13:32,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:32,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:32,569 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 01:13:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,691 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2022-02-15 01:13:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 51 [2022-02-15 01:13:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,692 INFO L225 Difference]: With dead ends: 165 [2022-02-15 01:13:32,692 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:13:32,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:32,692 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:13:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-02-15 01:13:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-02-15 01:13:32,723 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2022-02-15 01:13:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,724 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-02-15 01:13:32,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 01:13:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-02-15 01:13:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:13:32,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,724 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:13:32,724 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2022-02-15 01:13:32,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818922569] [2022-02-15 01:13:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,726 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,727 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818922569] [2022-02-15 01:13:32,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818922569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:13:32,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678145242] [2022-02-15 01:13:32,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:13:32,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:13:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:13:32,795 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 01:13:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,964 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2022-02-15 01:13:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 54 [2022-02-15 01:13:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,964 INFO L225 Difference]: With dead ends: 189 [2022-02-15 01:13:32,964 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 01:13:32,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:32,965 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 01:13:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-02-15 01:13:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-02-15 01:13:33,003 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2022-02-15 01:13:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:33,003 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-02-15 01:13:33,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 01:13:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-02-15 01:13:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:13:33,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:33,004 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:33,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:13:33,004 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2022-02-15 01:13:33,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:33,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262873271] [2022-02-15 01:13:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:33,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:33,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:33,007 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:33,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262873271] [2022-02-15 01:13:33,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [262873271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:33,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:33,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:33,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772726318] [2022-02-15 01:13:33,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:33,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:33,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:33,095 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:33,315 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2022-02-15 01:13:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-15 01:13:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:33,316 INFO L225 Difference]: With dead ends: 213 [2022-02-15 01:13:33,316 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 01:13:33,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:33,317 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:33,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 60 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 01:13:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-15 01:13:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-15 01:13:33,361 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2022-02-15 01:13:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:33,361 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-15 01:13:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-15 01:13:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:33,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:33,362 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:33,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:13:33,362 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2022-02-15 01:13:33,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:33,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441209804] [2022-02-15 01:13:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:33,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:33,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:33,365 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:33,457 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:33,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441209804] [2022-02-15 01:13:33,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [441209804] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:33,457 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:33,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:33,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359106938] [2022-02-15 01:13:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:33,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:33,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:33,458 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:33,756 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2022-02-15 01:13:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:13:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:13:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:33,757 INFO L225 Difference]: With dead ends: 237 [2022-02-15 01:13:33,757 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 01:13:33,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:13:33,758 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:33,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 01:13:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-02-15 01:13:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-02-15 01:13:33,804 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2022-02-15 01:13:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-02-15 01:13:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-02-15 01:13:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:33,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:33,805 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:33,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:13:33,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2022-02-15 01:13:33,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:33,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95464182] [2022-02-15 01:13:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:33,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:33,807 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:33,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:33,808 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:33,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:33,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95464182] [2022-02-15 01:13:33,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [95464182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:33,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:33,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:13:33,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964829217] [2022-02-15 01:13:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:33,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:13:33,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:13:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:33,919 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:34,270 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-02-15 01:13:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:13:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 01:13:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:34,271 INFO L225 Difference]: With dead ends: 261 [2022-02-15 01:13:34,271 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:13:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:13:34,271 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:34,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:13:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-02-15 01:13:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-15 01:13:34,322 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2022-02-15 01:13:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-15 01:13:34,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-15 01:13:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:13:34,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:34,323 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:34,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:13:34,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:34,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2022-02-15 01:13:34,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:34,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116402407] [2022-02-15 01:13:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:34,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:34,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:34,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:34,327 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:34,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:34,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116402407] [2022-02-15 01:13:34,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116402407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:34,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:34,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:13:34,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493256817] [2022-02-15 01:13:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:13:34,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:13:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:13:34,402 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:34,515 INFO L93 Difference]: Finished difference Result 327 states and 426 transitions. [2022-02-15 01:13:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:13:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:13:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:34,517 INFO L225 Difference]: With dead ends: 327 [2022-02-15 01:13:34,517 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 01:13:34,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:34,518 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:34,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 01:13:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2022-02-15 01:13:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2022-02-15 01:13:34,602 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2022-02-15 01:13:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:34,602 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2022-02-15 01:13:34,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2022-02-15 01:13:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:13:34,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:34,603 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 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 01:13:34,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:13:34,603 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2022-02-15 01:13:34,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:34,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515605822] [2022-02-15 01:13:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:34,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:34,605 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:34,606 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:34,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:34,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515605822] [2022-02-15 01:13:34,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515605822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:34,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:34,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:13:34,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434887109] [2022-02-15 01:13:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:34,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:13:34,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:13:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:34,712 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:35,173 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-02-15 01:13:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:13:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 67 [2022-02-15 01:13:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:35,174 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:13:35,174 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 01:13:35,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:35,175 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 147 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:35,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 111 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 01:13:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-15 01:13:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2022-02-15 01:13:35,232 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2022-02-15 01:13:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:35,232 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2022-02-15 01:13:35,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2022-02-15 01:13:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:13:35,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:35,233 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:35,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:13:35,233 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2022-02-15 01:13:35,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:35,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185564330] [2022-02-15 01:13:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:35,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:35,235 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:35,236 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:35,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:35,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185564330] [2022-02-15 01:13:35,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185564330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:35,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:35,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:35,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805893695] [2022-02-15 01:13:35,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:35,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:35,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:35,438 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:35,728 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2022-02-15 01:13:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:13:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:35,730 INFO L225 Difference]: With dead ends: 341 [2022-02-15 01:13:35,730 INFO L226 Difference]: Without dead ends: 336 [2022-02-15 01:13:35,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:35,731 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:35,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-15 01:13:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 160. [2022-02-15 01:13:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 155 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 203 transitions. [2022-02-15 01:13:35,828 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 203 transitions. Word has length 68 [2022-02-15 01:13:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:35,828 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 203 transitions. [2022-02-15 01:13:35,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 203 transitions. [2022-02-15 01:13:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:13:35,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:35,829 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 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 01:13:35,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:13:35,829 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2022-02-15 01:13:35,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:35,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655500590] [2022-02-15 01:13:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:35,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:35,831 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:35,833 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:35,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:35,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655500590] [2022-02-15 01:13:35,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655500590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:35,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:35,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:13:35,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093864122] [2022-02-15 01:13:35,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:35,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:13:35,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:13:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:35,979 INFO L87 Difference]: Start difference. First operand 160 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 01:13:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:36,397 INFO L93 Difference]: Finished difference Result 299 states and 389 transitions. [2022-02-15 01:13:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:13:36,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 70 [2022-02-15 01:13:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:36,398 INFO L225 Difference]: With dead ends: 299 [2022-02-15 01:13:36,398 INFO L226 Difference]: Without dead ends: 174 [2022-02-15 01:13:36,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:13:36,399 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 157 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:36,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 98 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-15 01:13:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-02-15 01:13:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.2732919254658386) internal successors, (205), 161 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2022-02-15 01:13:36,483 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 70 [2022-02-15 01:13:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:36,483 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2022-02-15 01:13:36,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 01:13:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2022-02-15 01:13:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:13:36,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:36,484 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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 01:13:36,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:13:36,484 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2022-02-15 01:13:36,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:36,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514867631] [2022-02-15 01:13:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:36,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:36,487 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:36,488 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:37,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:37,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514867631] [2022-02-15 01:13:37,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514867631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:37,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:37,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:13:37,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419203772] [2022-02-15 01:13:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:37,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:13:37,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:13:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:37,167 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:38,198 INFO L93 Difference]: Finished difference Result 224 states and 284 transitions. [2022-02-15 01:13:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:13:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 01:13:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:38,199 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:13:38,199 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 01:13:38,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:13:38,200 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:38,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 99 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 01:13:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-02-15 01:13:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.2737430167597765) internal successors, (228), 179 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2022-02-15 01:13:38,280 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 73 [2022-02-15 01:13:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:38,280 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2022-02-15 01:13:38,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2022-02-15 01:13:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:13:38,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:38,281 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:38,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:13:38,281 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash -167455655, now seen corresponding path program 1 times [2022-02-15 01:13:38,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:38,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769429797] [2022-02-15 01:13:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:38,283 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:38,283 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:38,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:38,284 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:38,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:38,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769429797] [2022-02-15 01:13:38,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769429797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:38,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:38,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:38,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234390475] [2022-02-15 01:13:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:38,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:38,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:38,537 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:38,775 INFO L93 Difference]: Finished difference Result 278 states and 353 transitions. [2022-02-15 01:13:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:38,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 01:13:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:38,776 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:13:38,776 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:13:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:38,777 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:38,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:13:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-02-15 01:13:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.271186440677966) internal successors, (225), 177 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2022-02-15 01:13:38,860 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 73 [2022-02-15 01:13:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:38,860 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2022-02-15 01:13:38,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2022-02-15 01:13:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:13:38,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:38,861 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:13:38,861 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 965894068, now seen corresponding path program 1 times [2022-02-15 01:13:38,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:38,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732662441] [2022-02-15 01:13:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:38,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:38,863 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:38,865 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:38,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:38,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732662441] [2022-02-15 01:13:38,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732662441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:38,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:38,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:38,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575849589] [2022-02-15 01:13:38,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:38,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:38,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:38,944 INFO L87 Difference]: Start difference. First operand 182 states and 229 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:39,543 INFO L93 Difference]: Finished difference Result 840 states and 1094 transitions. [2022-02-15 01:13:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 75 [2022-02-15 01:13:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:39,548 INFO L225 Difference]: With dead ends: 840 [2022-02-15 01:13:39,548 INFO L226 Difference]: Without dead ends: 748 [2022-02-15 01:13:39,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:39,549 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:39,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-15 01:13:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 188. [2022-02-15 01:13:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.273224043715847) internal successors, (233), 183 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2022-02-15 01:13:39,640 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 75 [2022-02-15 01:13:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:39,640 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2022-02-15 01:13:39,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2022-02-15 01:13:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:13:39,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:39,641 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 3, 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 01:13:39,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:13:39,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:39,642 INFO L85 PathProgramCache]: Analyzing trace with hash 817686058, now seen corresponding path program 2 times [2022-02-15 01:13:39,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:39,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432104877] [2022-02-15 01:13:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:39,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:39,643 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:39,644 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:39,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432104877] [2022-02-15 01:13:39,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432104877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:39,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:39,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:13:39,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336110924] [2022-02-15 01:13:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:13:39,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:13:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:13:39,728 INFO L87 Difference]: Start difference. First operand 188 states and 237 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 01:13:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:40,369 INFO L93 Difference]: Finished difference Result 855 states and 1113 transitions. [2022-02-15 01:13:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:40,369 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 79 [2022-02-15 01:13:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:40,372 INFO L225 Difference]: With dead ends: 855 [2022-02-15 01:13:40,372 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 01:13:40,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:40,373 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 145 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:40,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 01:13:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 190. [2022-02-15 01:13:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 185 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2022-02-15 01:13:40,473 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 79 [2022-02-15 01:13:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:40,473 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2022-02-15 01:13:40,473 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 01:13:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2022-02-15 01:13:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 01:13:40,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:40,474 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 4, 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 01:13:40,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:13:40,474 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1500692155, now seen corresponding path program 3 times [2022-02-15 01:13:40,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:40,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398046146] [2022-02-15 01:13:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:40,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:40,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:40,477 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:40,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:40,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:40,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398046146] [2022-02-15 01:13:40,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398046146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:40,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:40,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:40,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732238567] [2022-02-15 01:13:40,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:40,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:40,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:40,577 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 01:13:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:41,724 INFO L93 Difference]: Finished difference Result 1287 states and 1682 transitions. [2022-02-15 01:13:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:13:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 81 [2022-02-15 01:13:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:41,727 INFO L225 Difference]: With dead ends: 1287 [2022-02-15 01:13:41,727 INFO L226 Difference]: Without dead ends: 1195 [2022-02-15 01:13:41,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:41,728 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 133 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-15 01:13:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 194. [2022-02-15 01:13:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.2804232804232805) internal successors, (242), 189 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 246 transitions. [2022-02-15 01:13:41,837 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 246 transitions. Word has length 81 [2022-02-15 01:13:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 246 transitions. [2022-02-15 01:13:41,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 01:13:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 246 transitions. [2022-02-15 01:13:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 01:13:41,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:41,838 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 6, 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 01:13:41,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:13:41,838 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash -77949125, now seen corresponding path program 4 times [2022-02-15 01:13:41,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:41,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412383833] [2022-02-15 01:13:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:41,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:41,840 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:41,841 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:41,967 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:41,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412383833] [2022-02-15 01:13:41,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412383833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:41,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:41,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:13:41,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363904409] [2022-02-15 01:13:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:41,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:13:41,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:13:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:41,968 INFO L87 Difference]: Start difference. First operand 194 states and 246 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:43,532 INFO L93 Difference]: Finished difference Result 1585 states and 2074 transitions. [2022-02-15 01:13:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:13:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-15 01:13:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:43,536 INFO L225 Difference]: With dead ends: 1585 [2022-02-15 01:13:43,536 INFO L226 Difference]: Without dead ends: 1493 [2022-02-15 01:13:43,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:13:43,537 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 278 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:43,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 181 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-02-15 01:13:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 198. [2022-02-15 01:13:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2849740932642486) internal successors, (248), 193 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 252 transitions. [2022-02-15 01:13:43,662 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 252 transitions. Word has length 85 [2022-02-15 01:13:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:43,662 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 252 transitions. [2022-02-15 01:13:43,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 252 transitions. [2022-02-15 01:13:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:13:43,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:43,663 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 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 01:13:43,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:13:43,663 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -587201999, now seen corresponding path program 5 times [2022-02-15 01:13:43,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:43,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481819205] [2022-02-15 01:13:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:43,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:43,665 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:43,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:43,666 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:43,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:43,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481819205] [2022-02-15 01:13:43,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [481819205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:43,814 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:43,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:13:43,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210172543] [2022-02-15 01:13:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:43,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:13:43,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:13:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:13:43,815 INFO L87 Difference]: Start difference. First operand 198 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:45,891 INFO L93 Difference]: Finished difference Result 1883 states and 2466 transitions. [2022-02-15 01:13:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:13:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:13:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:45,897 INFO L225 Difference]: With dead ends: 1883 [2022-02-15 01:13:45,897 INFO L226 Difference]: Without dead ends: 1791 [2022-02-15 01:13:45,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:13:45,898 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 384 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:45,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 219 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:13:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-02-15 01:13:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 202. [2022-02-15 01:13:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 197 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2022-02-15 01:13:46,044 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 89 [2022-02-15 01:13:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:46,044 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2022-02-15 01:13:46,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2022-02-15 01:13:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:13:46,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:46,045 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 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 01:13:46,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:13:46,045 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1198195239, now seen corresponding path program 6 times [2022-02-15 01:13:46,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:46,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709766427] [2022-02-15 01:13:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:46,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:46,047 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:46,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:46,048 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:46,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:46,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:46,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709766427] [2022-02-15 01:13:46,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [709766427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:46,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:46,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:13:46,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744531008] [2022-02-15 01:13:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:46,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:13:46,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:13:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:46,229 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 01:13:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:49,127 INFO L93 Difference]: Finished difference Result 2181 states and 2858 transitions. [2022-02-15 01:13:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:13:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 93 [2022-02-15 01:13:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:49,133 INFO L225 Difference]: With dead ends: 2181 [2022-02-15 01:13:49,133 INFO L226 Difference]: Without dead ends: 2089 [2022-02-15 01:13:49,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:13:49,134 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 398 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:49,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 277 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:13:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-02-15 01:13:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 206. [2022-02-15 01:13:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.2935323383084578) internal successors, (260), 201 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2022-02-15 01:13:49,283 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 93 [2022-02-15 01:13:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:49,283 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2022-02-15 01:13:49,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 01:13:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2022-02-15 01:13:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 01:13:49,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:49,284 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 10, 10, 10, 10, 9, 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 01:13:49,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:13:49,284 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2083973347, now seen corresponding path program 7 times [2022-02-15 01:13:49,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:49,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124047637] [2022-02-15 01:13:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:49,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:49,286 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:49,288 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:49,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:49,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:49,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124047637] [2022-02-15 01:13:49,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124047637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:49,502 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:49,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:13:49,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102666516] [2022-02-15 01:13:49,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:49,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:13:49,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:13:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:49,503 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 01:13:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:53,175 INFO L93 Difference]: Finished difference Result 2479 states and 3250 transitions. [2022-02-15 01:13:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:13:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 97 [2022-02-15 01:13:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:53,181 INFO L225 Difference]: With dead ends: 2479 [2022-02-15 01:13:53,181 INFO L226 Difference]: Without dead ends: 2387 [2022-02-15 01:13:53,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:13:53,182 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 472 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:53,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 320 Invalid, 4008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:13:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-02-15 01:13:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 210. [2022-02-15 01:13:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2975609756097561) internal successors, (266), 205 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 270 transitions. [2022-02-15 01:13:53,348 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 270 transitions. Word has length 97 [2022-02-15 01:13:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 270 transitions. [2022-02-15 01:13:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 01:13:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 270 transitions. [2022-02-15 01:13:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 01:13:53,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:53,349 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 9, 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 01:13:53,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:13:53,349 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2004369133, now seen corresponding path program 8 times [2022-02-15 01:13:53,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:53,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012625095] [2022-02-15 01:13:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:53,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:53,351 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:53,352 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:53,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:53,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:53,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012625095] [2022-02-15 01:13:53,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012625095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:53,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:53,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:13:53,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871067633] [2022-02-15 01:13:53,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:53,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:13:53,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:13:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:13:53,616 INFO L87 Difference]: Start difference. First operand 210 states and 270 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:57,862 INFO L93 Difference]: Finished difference Result 2494 states and 3269 transitions. [2022-02-15 01:13:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:13:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-15 01:13:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:57,868 INFO L225 Difference]: With dead ends: 2494 [2022-02-15 01:13:57,868 INFO L226 Difference]: Without dead ends: 2402 [2022-02-15 01:13:57,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:13:57,870 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 472 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 5097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:57,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 356 Invalid, 5097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:13:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-02-15 01:13:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 212. [2022-02-15 01:13:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2995169082125604) internal successors, (269), 207 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-02-15 01:13:58,062 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 101 [2022-02-15 01:13:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:58,062 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-02-15 01:13:58,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-02-15 01:13:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:13:58,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:58,063 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:58,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:13:58,063 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-02-15 01:13:58,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:58,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396677568] [2022-02-15 01:13:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:58,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:58,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:58,066 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:58,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:58,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:58,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396677568] [2022-02-15 01:13:58,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396677568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:58,678 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:58,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:13:58,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765612858] [2022-02-15 01:13:58,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:58,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:13:58,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:13:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:58,679 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:59,649 INFO L93 Difference]: Finished difference Result 312 states and 402 transitions. [2022-02-15 01:13:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:13:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:13:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:59,650 INFO L225 Difference]: With dead ends: 312 [2022-02-15 01:13:59,650 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 01:13:59,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:13:59,651 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:59,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 95 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 01:13:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-02-15 01:13:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2968036529680365) internal successors, (284), 219 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 288 transitions. [2022-02-15 01:13:59,849 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 288 transitions. Word has length 102 [2022-02-15 01:13:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:59,850 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 288 transitions. [2022-02-15 01:13:59,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 288 transitions. [2022-02-15 01:13:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:13:59,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:59,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:59,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:13:59,851 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash 127158152, now seen corresponding path program 1 times [2022-02-15 01:13:59,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:59,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440483627] [2022-02-15 01:13:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:59,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:59,852 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:59,853 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:00,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:00,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440483627] [2022-02-15 01:14:00,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [440483627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:00,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:00,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:14:00,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294559246] [2022-02-15 01:14:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:00,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:14:00,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:14:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:14:00,371 INFO L87 Difference]: Start difference. First operand 224 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:01,068 INFO L93 Difference]: Finished difference Result 323 states and 415 transitions. [2022-02-15 01:14:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:14:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:01,069 INFO L225 Difference]: With dead ends: 323 [2022-02-15 01:14:01,069 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:14:01,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:01,070 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:01,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 81 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:14:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-15 01:14:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2922374429223744) internal successors, (283), 219 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2022-02-15 01:14:01,260 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 102 [2022-02-15 01:14:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:01,260 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2022-02-15 01:14:01,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2022-02-15 01:14:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:01,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:01,261 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:01,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:14:01,261 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:01,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-02-15 01:14:01,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:01,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598259337] [2022-02-15 01:14:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:01,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:01,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:01,264 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:01,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:01,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598259337] [2022-02-15 01:14:01,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598259337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:01,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:01,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:14:01,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420100243] [2022-02-15 01:14:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:14:01,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:14:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:14:01,881 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:02,624 INFO L93 Difference]: Finished difference Result 323 states and 413 transitions. [2022-02-15 01:14:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:14:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:02,626 INFO L225 Difference]: With dead ends: 323 [2022-02-15 01:14:02,626 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:14:02,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:14:02,626 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:02,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 74 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:14:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-15 01:14:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2876712328767124) internal successors, (282), 219 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 286 transitions. [2022-02-15 01:14:02,822 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 286 transitions. Word has length 102 [2022-02-15 01:14:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:02,822 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 286 transitions. [2022-02-15 01:14:02,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 286 transitions. [2022-02-15 01:14:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:02,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:02,823 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:14:02,823 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:02,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-02-15 01:14:02,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:02,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746861407] [2022-02-15 01:14:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:02,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:02,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:02,826 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:03,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:03,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746861407] [2022-02-15 01:14:03,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746861407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:03,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:03,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:14:03,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548112546] [2022-02-15 01:14:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:14:03,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:14:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:14:03,381 INFO L87 Difference]: Start difference. First operand 224 states and 286 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:04,202 INFO L93 Difference]: Finished difference Result 323 states and 411 transitions. [2022-02-15 01:14:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:14:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 102 [2022-02-15 01:14:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:04,203 INFO L225 Difference]: With dead ends: 323 [2022-02-15 01:14:04,203 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:14:04,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:14:04,204 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:04,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 87 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:14:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-15 01:14:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 219 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 285 transitions. [2022-02-15 01:14:04,393 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 285 transitions. Word has length 102 [2022-02-15 01:14:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:04,393 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 285 transitions. [2022-02-15 01:14:04,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 285 transitions. [2022-02-15 01:14:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:04,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:04,393 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:14:04,394 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 4 times [2022-02-15 01:14:04,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:04,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456919207] [2022-02-15 01:14:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:04,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:04,395 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:04,396 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:05,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:05,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456919207] [2022-02-15 01:14:05,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456919207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:05,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:05,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:14:05,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509694203] [2022-02-15 01:14:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:05,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:14:05,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:14:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:14:05,256 INFO L87 Difference]: Start difference. First operand 224 states and 285 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:06,644 INFO L93 Difference]: Finished difference Result 367 states and 470 transitions. [2022-02-15 01:14:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:14:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:06,646 INFO L225 Difference]: With dead ends: 367 [2022-02-15 01:14:06,646 INFO L226 Difference]: Without dead ends: 310 [2022-02-15 01:14:06,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:14:06,647 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 140 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:06,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:14:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-15 01:14:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2022-02-15 01:14:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2890365448504983) internal successors, (388), 301 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 392 transitions. [2022-02-15 01:14:06,934 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 392 transitions. Word has length 102 [2022-02-15 01:14:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:06,934 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 392 transitions. [2022-02-15 01:14:06,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 392 transitions. [2022-02-15 01:14:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:06,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:06,935 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 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, 1, 1, 1, 1] [2022-02-15 01:14:06,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:14:06,935 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 5 times [2022-02-15 01:14:06,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:06,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792713299] [2022-02-15 01:14:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:06,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:06,937 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:06,938 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:08,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:08,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792713299] [2022-02-15 01:14:08,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [792713299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:08,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:08,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:14:08,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649508423] [2022-02-15 01:14:08,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:08,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:14:08,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:14:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:14:08,039 INFO L87 Difference]: Start difference. First operand 306 states and 392 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:09,861 INFO L93 Difference]: Finished difference Result 370 states and 471 transitions. [2022-02-15 01:14:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:14:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:09,863 INFO L225 Difference]: With dead ends: 370 [2022-02-15 01:14:09,863 INFO L226 Difference]: Without dead ends: 313 [2022-02-15 01:14:09,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:14:09,864 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 144 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:09,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 128 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:14:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-15 01:14:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 306. [2022-02-15 01:14:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2857142857142858) internal successors, (387), 301 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 391 transitions. [2022-02-15 01:14:10,147 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 391 transitions. Word has length 102 [2022-02-15 01:14:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:10,147 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 391 transitions. [2022-02-15 01:14:10,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 391 transitions. [2022-02-15 01:14:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:10,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:10,148 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:10,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:14:10,148 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:10,149 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 6 times [2022-02-15 01:14:10,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:10,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507937630] [2022-02-15 01:14:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:10,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:10,150 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:10,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:10,151 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:11,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:11,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507937630] [2022-02-15 01:14:11,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507937630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:11,849 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:11,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:14:11,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911638010] [2022-02-15 01:14:11,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:11,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:14:11,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:14:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:14:11,850 INFO L87 Difference]: Start difference. First operand 306 states and 391 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:14,327 INFO L93 Difference]: Finished difference Result 974 states and 1252 transitions. [2022-02-15 01:14:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:14:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:14,329 INFO L225 Difference]: With dead ends: 974 [2022-02-15 01:14:14,329 INFO L226 Difference]: Without dead ends: 793 [2022-02-15 01:14:14,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=2784, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:14:14,331 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 285 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:14,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 96 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:14:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-15 01:14:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 535. [2022-02-15 01:14:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.2754716981132075) internal successors, (676), 530 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 680 transitions. [2022-02-15 01:14:14,893 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 680 transitions. Word has length 102 [2022-02-15 01:14:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:14,893 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 680 transitions. [2022-02-15 01:14:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 680 transitions. [2022-02-15 01:14:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:14,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:14,894 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:14,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:14:14,894 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 7 times [2022-02-15 01:14:14,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:14,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99780040] [2022-02-15 01:14:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:14,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:14,896 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:14,897 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:16,643 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:16,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99780040] [2022-02-15 01:14:16,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99780040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:16,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:16,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:14:16,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612158271] [2022-02-15 01:14:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:16,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:14:16,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:14:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:14:16,644 INFO L87 Difference]: Start difference. First operand 535 states and 680 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:19,550 INFO L93 Difference]: Finished difference Result 1186 states and 1513 transitions. [2022-02-15 01:14:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:14:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:19,565 INFO L225 Difference]: With dead ends: 1186 [2022-02-15 01:14:19,565 INFO L226 Difference]: Without dead ends: 917 [2022-02-15 01:14:19,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=574, Invalid=3332, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:14:19,567 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 313 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:19,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 73 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:14:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-02-15 01:14:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 665. [2022-02-15 01:14:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2696969696969698) internal successors, (838), 660 states have internal predecessors, (838), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 842 transitions. [2022-02-15 01:14:20,288 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 842 transitions. Word has length 102 [2022-02-15 01:14:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:20,289 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 842 transitions. [2022-02-15 01:14:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 842 transitions. [2022-02-15 01:14:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:20,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:20,290 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:20,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:14:20,290 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 8 times [2022-02-15 01:14:20,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:20,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343750915] [2022-02-15 01:14:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:20,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:20,293 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:20,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:20,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:20,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:20,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343750915] [2022-02-15 01:14:20,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343750915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:20,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:20,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:14:20,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713745738] [2022-02-15 01:14:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:14:20,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:14:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:14:20,974 INFO L87 Difference]: Start difference. First operand 665 states and 842 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:14:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:22,512 INFO L93 Difference]: Finished difference Result 774 states and 982 transitions. [2022-02-15 01:14:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:14:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-15 01:14:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:22,514 INFO L225 Difference]: With dead ends: 774 [2022-02-15 01:14:22,514 INFO L226 Difference]: Without dead ends: 665 [2022-02-15 01:14:22,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:14:22,515 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:22,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 101 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-15 01:14:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-02-15 01:14:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2666666666666666) internal successors, (836), 660 states have internal predecessors, (836), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 840 transitions. [2022-02-15 01:14:23,242 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 840 transitions. Word has length 102 [2022-02-15 01:14:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:23,242 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 840 transitions. [2022-02-15 01:14:23,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:14:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 840 transitions. [2022-02-15 01:14:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:23,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:23,244 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:23,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:14:23,244 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 9 times [2022-02-15 01:14:23,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:23,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627554872] [2022-02-15 01:14:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:23,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:23,245 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:23,247 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:23,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:23,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627554872] [2022-02-15 01:14:23,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627554872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:23,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:23,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:14:23,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855717350] [2022-02-15 01:14:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:23,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:14:23,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:14:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:14:23,421 INFO L87 Difference]: Start difference. First operand 665 states and 840 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:30,746 INFO L93 Difference]: Finished difference Result 5119 states and 6455 transitions. [2022-02-15 01:14:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:14:30,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:30,758 INFO L225 Difference]: With dead ends: 5119 [2022-02-15 01:14:30,758 INFO L226 Difference]: Without dead ends: 5111 [2022-02-15 01:14:30,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:14:30,759 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:30,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 263 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:14:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2022-02-15 01:14:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 2575. [2022-02-15 01:14:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2570 states have (on average 1.2634241245136186) internal successors, (3247), 2570 states have internal predecessors, (3247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3251 transitions. [2022-02-15 01:14:33,995 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3251 transitions. Word has length 102 [2022-02-15 01:14:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:33,996 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 3251 transitions. [2022-02-15 01:14:33,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3251 transitions. [2022-02-15 01:14:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:33,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:33,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:33,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:14:33,999 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash 210306698, now seen corresponding path program 10 times [2022-02-15 01:14:33,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:33,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55346370] [2022-02-15 01:14:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:34,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:34,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:34,002 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:35,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:35,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55346370] [2022-02-15 01:14:35,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [55346370] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:35,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:35,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:14:35,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769886830] [2022-02-15 01:14:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:35,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:14:35,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:14:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:14:35,835 INFO L87 Difference]: Start difference. First operand 2575 states and 3251 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:41,754 INFO L93 Difference]: Finished difference Result 3520 states and 4458 transitions. [2022-02-15 01:14:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:14:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:41,762 INFO L225 Difference]: With dead ends: 3520 [2022-02-15 01:14:41,762 INFO L226 Difference]: Without dead ends: 3273 [2022-02-15 01:14:41,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=2507, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:14:41,763 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 237 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:41,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 115 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:14:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-02-15 01:14:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2596. [2022-02-15 01:14:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2591 states have (on average 1.2636047857969896) internal successors, (3274), 2591 states have internal predecessors, (3274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3278 transitions. [2022-02-15 01:14:45,011 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3278 transitions. Word has length 102 [2022-02-15 01:14:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:45,011 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3278 transitions. [2022-02-15 01:14:45,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3278 transitions. [2022-02-15 01:14:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:45,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:45,015 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:45,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:14:45,015 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash -182720312, now seen corresponding path program 11 times [2022-02-15 01:14:45,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:45,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980940265] [2022-02-15 01:14:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:45,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:45,016 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:45,018 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:46,292 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:46,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980940265] [2022-02-15 01:14:46,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980940265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:46,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:46,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:14:46,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77955326] [2022-02-15 01:14:46,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:46,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:14:46,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:14:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:46,293 INFO L87 Difference]: Start difference. First operand 2596 states and 3278 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:51,110 INFO L93 Difference]: Finished difference Result 3763 states and 4741 transitions. [2022-02-15 01:14:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:14:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:14:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:51,119 INFO L225 Difference]: With dead ends: 3763 [2022-02-15 01:14:51,120 INFO L226 Difference]: Without dead ends: 3073 [2022-02-15 01:14:51,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:14:51,122 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 272 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:51,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 50 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-02-15 01:14:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 2453. [2022-02-15 01:14:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2448 states have (on average 1.2610294117647058) internal successors, (3087), 2448 states have internal predecessors, (3087), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3091 transitions. [2022-02-15 01:14:54,202 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3091 transitions. Word has length 102 [2022-02-15 01:14:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:54,202 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3091 transitions. [2022-02-15 01:14:54,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3091 transitions. [2022-02-15 01:14:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:14:54,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:54,205 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:54,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:14:54,206 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 12 times [2022-02-15 01:14:54,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:54,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484208978] [2022-02-15 01:14:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:54,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:54,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:54,208 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:54,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:54,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484208978] [2022-02-15 01:14:54,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484208978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:54,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:54,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:14:54,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006701322] [2022-02-15 01:14:54,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:54,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:14:54,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:14:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:14:54,719 INFO L87 Difference]: Start difference. First operand 2453 states and 3091 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 01:14:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:58,501 INFO L93 Difference]: Finished difference Result 3349 states and 4187 transitions. [2022-02-15 01:14:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:14:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 102 [2022-02-15 01:14:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:58,506 INFO L225 Difference]: With dead ends: 3349 [2022-02-15 01:14:58,506 INFO L226 Difference]: Without dead ends: 2642 [2022-02-15 01:14:58,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:14:58,507 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 119 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 59 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:14:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2022-02-15 01:15:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2615. [2022-02-15 01:15:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2610 states have (on average 1.253639846743295) internal successors, (3272), 2610 states have internal predecessors, (3272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3276 transitions. [2022-02-15 01:15:01,845 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3276 transitions. Word has length 102 [2022-02-15 01:15:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:01,845 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3276 transitions. [2022-02-15 01:15:01,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 01:15:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3276 transitions. [2022-02-15 01:15:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:01,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:01,848 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:01,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:15:01,849 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1954191478, now seen corresponding path program 13 times [2022-02-15 01:15:01,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:01,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282485034] [2022-02-15 01:15:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:01,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:01,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:01,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:01,851 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:02,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:02,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:02,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282485034] [2022-02-15 01:15:02,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282485034] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:02,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:02,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:15:02,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706974358] [2022-02-15 01:15:02,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:02,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:15:02,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:15:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:15:02,344 INFO L87 Difference]: Start difference. First operand 2615 states and 3276 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:06,671 INFO L93 Difference]: Finished difference Result 4843 states and 6068 transitions. [2022-02-15 01:15:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:15:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:15:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:06,675 INFO L225 Difference]: With dead ends: 4843 [2022-02-15 01:15:06,675 INFO L226 Difference]: Without dead ends: 2873 [2022-02-15 01:15:06,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:15:06,678 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 174 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:06,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:15:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-02-15 01:15:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2684. [2022-02-15 01:15:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2679 states have (on average 1.253826054497947) internal successors, (3359), 2679 states have internal predecessors, (3359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3363 transitions. [2022-02-15 01:15:10,117 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3363 transitions. Word has length 102 [2022-02-15 01:15:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:10,117 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3363 transitions. [2022-02-15 01:15:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3363 transitions. [2022-02-15 01:15:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:10,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:10,120 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:10,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:15:10,121 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1046987130, now seen corresponding path program 14 times [2022-02-15 01:15:10,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:10,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139512406] [2022-02-15 01:15:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:10,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:10,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:10,124 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:10,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:10,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:10,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139512406] [2022-02-15 01:15:10,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139512406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:10,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:10,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:15:10,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571249238] [2022-02-15 01:15:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:15:10,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:15:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:15:10,533 INFO L87 Difference]: Start difference. First operand 2684 states and 3363 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:14,578 INFO L93 Difference]: Finished difference Result 4412 states and 5523 transitions. [2022-02-15 01:15:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:15:14,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:15:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:14,582 INFO L225 Difference]: With dead ends: 4412 [2022-02-15 01:15:14,582 INFO L226 Difference]: Without dead ends: 2724 [2022-02-15 01:15:14,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:15:14,585 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:14,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 65 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:15:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-02-15 01:15:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2714. [2022-02-15 01:15:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2709 states have (on average 1.2476928755998524) internal successors, (3380), 2709 states have internal predecessors, (3380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3384 transitions. [2022-02-15 01:15:18,061 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3384 transitions. Word has length 102 [2022-02-15 01:15:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:18,062 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3384 transitions. [2022-02-15 01:15:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3384 transitions. [2022-02-15 01:15:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:18,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:18,065 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:18,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:15:18,065 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash 491352900, now seen corresponding path program 15 times [2022-02-15 01:15:18,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:18,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55966638] [2022-02-15 01:15:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:18,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:18,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:18,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:18,068 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:18,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:18,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55966638] [2022-02-15 01:15:18,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [55966638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:18,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:18,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:15:18,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831381549] [2022-02-15 01:15:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:15:18,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:15:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:15:18,519 INFO L87 Difference]: Start difference. First operand 2714 states and 3384 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:22,659 INFO L93 Difference]: Finished difference Result 4494 states and 5595 transitions. [2022-02-15 01:15:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:15:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 102 [2022-02-15 01:15:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:22,664 INFO L225 Difference]: With dead ends: 4494 [2022-02-15 01:15:22,664 INFO L226 Difference]: Without dead ends: 2753 [2022-02-15 01:15:22,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:15:22,666 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:22,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 90 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:15:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-02-15 01:15:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2675. [2022-02-15 01:15:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2670 states have (on average 1.247940074906367) internal successors, (3332), 2670 states have internal predecessors, (3332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 3336 transitions. [2022-02-15 01:15:26,132 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 3336 transitions. Word has length 102 [2022-02-15 01:15:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:26,132 INFO L470 AbstractCegarLoop]: Abstraction has 2675 states and 3336 transitions. [2022-02-15 01:15:26,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 3336 transitions. [2022-02-15 01:15:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:26,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:26,135 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:26,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:15:26,136 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1213109560, now seen corresponding path program 16 times [2022-02-15 01:15:26,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:26,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805096530] [2022-02-15 01:15:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:26,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:26,139 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:26,148 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:27,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:27,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805096530] [2022-02-15 01:15:27,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [805096530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:27,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:27,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:15:27,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506094946] [2022-02-15 01:15:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:27,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:15:27,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:15:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:15:27,441 INFO L87 Difference]: Start difference. First operand 2675 states and 3336 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 01:15:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:32,814 INFO L93 Difference]: Finished difference Result 4189 states and 5245 transitions. [2022-02-15 01:15:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:15:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 102 [2022-02-15 01:15:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:32,819 INFO L225 Difference]: With dead ends: 4189 [2022-02-15 01:15:32,819 INFO L226 Difference]: Without dead ends: 3272 [2022-02-15 01:15:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:15:32,821 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 263 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:32,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 54 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:15:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-02-15 01:15:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2497. [2022-02-15 01:15:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2492 states have (on average 1.2359550561797752) internal successors, (3080), 2492 states have internal predecessors, (3080), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3084 transitions. [2022-02-15 01:15:36,087 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3084 transitions. Word has length 102 [2022-02-15 01:15:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:36,087 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 3084 transitions. [2022-02-15 01:15:36,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 01:15:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3084 transitions. [2022-02-15 01:15:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:36,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:36,090 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:36,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:15:36,090 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash -742749626, now seen corresponding path program 17 times [2022-02-15 01:15:36,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:36,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796040854] [2022-02-15 01:15:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:36,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:36,092 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:36,093 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:36,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:36,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796040854] [2022-02-15 01:15:36,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [796040854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:36,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:36,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:15:36,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194391858] [2022-02-15 01:15:36,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:36,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:15:36,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:15:36,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:15:36,657 INFO L87 Difference]: Start difference. First operand 2497 states and 3084 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:41,205 INFO L93 Difference]: Finished difference Result 3207 states and 3987 transitions. [2022-02-15 01:15:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:15:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:15:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:41,209 INFO L225 Difference]: With dead ends: 3207 [2022-02-15 01:15:41,209 INFO L226 Difference]: Without dead ends: 2822 [2022-02-15 01:15:41,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:15:41,210 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 107 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:41,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:15:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-02-15 01:15:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2722. [2022-02-15 01:15:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2717 states have (on average 1.2384983437615016) internal successors, (3365), 2717 states have internal predecessors, (3365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3369 transitions. [2022-02-15 01:15:44,848 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3369 transitions. Word has length 102 [2022-02-15 01:15:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 3369 transitions. [2022-02-15 01:15:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3369 transitions. [2022-02-15 01:15:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:44,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:44,851 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:44,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:15:44,851 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1135776636, now seen corresponding path program 18 times [2022-02-15 01:15:44,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:44,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717982935] [2022-02-15 01:15:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:44,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:44,853 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:44,854 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:45,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:45,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717982935] [2022-02-15 01:15:45,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717982935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:45,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:45,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:15:45,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991688065] [2022-02-15 01:15:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:45,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:15:45,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:15:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:15:45,704 INFO L87 Difference]: Start difference. First operand 2722 states and 3369 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:52,712 INFO L93 Difference]: Finished difference Result 4697 states and 5853 transitions. [2022-02-15 01:15:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:15:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:15:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:52,718 INFO L225 Difference]: With dead ends: 4697 [2022-02-15 01:15:52,718 INFO L226 Difference]: Without dead ends: 4192 [2022-02-15 01:15:52,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:15:52,719 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:52,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 123 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2022-02-15 01:15:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 4133. [2022-02-15 01:15:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4128 states have (on average 1.2415213178294573) internal successors, (5125), 4128 states have internal predecessors, (5125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5129 transitions. [2022-02-15 01:15:58,381 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5129 transitions. Word has length 102 [2022-02-15 01:15:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:58,381 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 5129 transitions. [2022-02-15 01:15:58,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5129 transitions. [2022-02-15 01:15:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:15:58,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:58,385 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:15:58,385 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 19 times [2022-02-15 01:15:58,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:58,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725583903] [2022-02-15 01:15:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:58,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:58,387 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:58,388 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:58,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:59,001 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:59,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725583903] [2022-02-15 01:15:59,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725583903] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:59,001 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:59,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:15:59,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146713244] [2022-02-15 01:15:59,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:59,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:15:59,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:15:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:15:59,002 INFO L87 Difference]: Start difference. First operand 4133 states and 5129 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:16:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:05,643 INFO L93 Difference]: Finished difference Result 5164 states and 6445 transitions. [2022-02-15 01:16:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:16:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-15 01:16:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:05,649 INFO L225 Difference]: With dead ends: 5164 [2022-02-15 01:16:05,649 INFO L226 Difference]: Without dead ends: 4237 [2022-02-15 01:16:05,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:16:05,651 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:05,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 91 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:16:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2022-02-15 01:16:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3911. [2022-02-15 01:16:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 3906 states have (on average 1.2386072708653353) internal successors, (4838), 3906 states have internal predecessors, (4838), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 4842 transitions. [2022-02-15 01:16:11,209 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 4842 transitions. Word has length 102 [2022-02-15 01:16:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:11,209 INFO L470 AbstractCegarLoop]: Abstraction has 3911 states and 4842 transitions. [2022-02-15 01:16:11,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:16:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 4842 transitions. [2022-02-15 01:16:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:16:11,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:11,213 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:11,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:16:11,213 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash -602201016, now seen corresponding path program 20 times [2022-02-15 01:16:11,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:11,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586009536] [2022-02-15 01:16:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:11,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:11,215 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:11,216 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:13,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:13,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586009536] [2022-02-15 01:16:13,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [586009536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:13,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:13,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:16:13,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164075386] [2022-02-15 01:16:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:13,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:16:13,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:16:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:16:13,034 INFO L87 Difference]: Start difference. First operand 3911 states and 4842 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:22,237 INFO L93 Difference]: Finished difference Result 5131 states and 6413 transitions. [2022-02-15 01:16:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:16:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:16:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:22,243 INFO L225 Difference]: With dead ends: 5131 [2022-02-15 01:16:22,243 INFO L226 Difference]: Without dead ends: 4872 [2022-02-15 01:16:22,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=488, Invalid=2818, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:16:22,244 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 346 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:22,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 109 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:16:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-02-15 01:16:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3932. [2022-02-15 01:16:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3927 states have (on average 1.2388591800356505) internal successors, (4865), 3927 states have internal predecessors, (4865), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 4869 transitions. [2022-02-15 01:16:27,842 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 4869 transitions. Word has length 102 [2022-02-15 01:16:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:27,843 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 4869 transitions. [2022-02-15 01:16:27,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 4869 transitions. [2022-02-15 01:16:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:16:27,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:27,847 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:27,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:16:27,847 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash -995228026, now seen corresponding path program 21 times [2022-02-15 01:16:27,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:27,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065733836] [2022-02-15 01:16:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:27,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:27,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:27,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:27,850 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:29,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:29,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065733836] [2022-02-15 01:16:29,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065733836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:29,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:29,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:16:29,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346748104] [2022-02-15 01:16:29,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:16:29,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:16:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:16:29,206 INFO L87 Difference]: Start difference. First operand 3932 states and 4869 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:37,177 INFO L93 Difference]: Finished difference Result 5380 states and 6702 transitions. [2022-02-15 01:16:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:16:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:16:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:37,183 INFO L225 Difference]: With dead ends: 5380 [2022-02-15 01:16:37,183 INFO L226 Difference]: Without dead ends: 4702 [2022-02-15 01:16:37,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:16:37,184 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 262 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:37,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 76 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:16:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2022-02-15 01:16:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3816. [2022-02-15 01:16:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3811 states have (on average 1.2374704801889267) internal successors, (4716), 3811 states have internal predecessors, (4716), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 4720 transitions. [2022-02-15 01:16:42,552 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 4720 transitions. Word has length 102 [2022-02-15 01:16:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:42,552 INFO L470 AbstractCegarLoop]: Abstraction has 3816 states and 4720 transitions. [2022-02-15 01:16:42,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 4720 transitions. [2022-02-15 01:16:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:16:42,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:42,556 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:42,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:16:42,556 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:42,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 22 times [2022-02-15 01:16:42,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:42,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493753844] [2022-02-15 01:16:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:42,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:42,558 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:42,559 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:43,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:43,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:43,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493753844] [2022-02-15 01:16:43,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [493753844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:43,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:43,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:16:43,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804829278] [2022-02-15 01:16:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:43,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:16:43,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:16:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:16:43,129 INFO L87 Difference]: Start difference. First operand 3816 states and 4720 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 01:16:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:49,366 INFO L93 Difference]: Finished difference Result 5220 states and 6444 transitions. [2022-02-15 01:16:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:16:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 102 [2022-02-15 01:16:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:49,370 INFO L225 Difference]: With dead ends: 5220 [2022-02-15 01:16:49,370 INFO L226 Difference]: Without dead ends: 4054 [2022-02-15 01:16:49,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:16:49,372 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:49,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:16:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2022-02-15 01:16:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4020. [2022-02-15 01:16:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4015 states have (on average 1.228642590286426) internal successors, (4933), 4015 states have internal predecessors, (4933), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 4937 transitions. [2022-02-15 01:16:55,025 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 4937 transitions. Word has length 102 [2022-02-15 01:16:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:55,025 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 4937 transitions. [2022-02-15 01:16:55,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 01:16:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 4937 transitions. [2022-02-15 01:16:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:16:55,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:55,030 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:55,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:16:55,030 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1076879158, now seen corresponding path program 23 times [2022-02-15 01:16:55,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:55,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902187888] [2022-02-15 01:16:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:55,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:55,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:55,033 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:55,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:55,492 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 01:16:55,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:55,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902187888] [2022-02-15 01:16:55,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902187888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:55,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:55,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:16:55,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480922155] [2022-02-15 01:16:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:16:55,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:16:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:16:55,493 INFO L87 Difference]: Start difference. First operand 4020 states and 4937 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:02,094 INFO L93 Difference]: Finished difference Result 7113 states and 8772 transitions. [2022-02-15 01:17:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:17:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:17:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:02,098 INFO L225 Difference]: With dead ends: 7113 [2022-02-15 01:17:02,099 INFO L226 Difference]: Without dead ends: 4246 [2022-02-15 01:17:02,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:17:02,102 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:02,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 91 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:17:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2022-02-15 01:17:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 4083. [2022-02-15 01:17:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4078 states have (on average 1.2290338401177048) internal successors, (5012), 4078 states have internal predecessors, (5012), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 5016 transitions. [2022-02-15 01:17:07,895 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 5016 transitions. Word has length 102 [2022-02-15 01:17:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:07,895 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 5016 transitions. [2022-02-15 01:17:07,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 5016 transitions. [2022-02-15 01:17:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:17:07,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:07,899 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:07,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:17:07,899 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash -169674810, now seen corresponding path program 24 times [2022-02-15 01:17:07,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:07,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097178062] [2022-02-15 01:17:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:07,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:07,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:07,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:07,902 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:08,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:08,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097178062] [2022-02-15 01:17:08,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097178062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:08,387 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:08,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:17:08,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328387894] [2022-02-15 01:17:08,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:08,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:17:08,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:17:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:17:08,388 INFO L87 Difference]: Start difference. First operand 4083 states and 5016 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 01:17:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:14,912 INFO L93 Difference]: Finished difference Result 6692 states and 8254 transitions. [2022-02-15 01:17:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:17:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 102 [2022-02-15 01:17:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:14,917 INFO L225 Difference]: With dead ends: 6692 [2022-02-15 01:17:14,917 INFO L226 Difference]: Without dead ends: 4129 [2022-02-15 01:17:14,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:17:14,920 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:14,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 89 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:17:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-02-15 01:17:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4050. [2022-02-15 01:17:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4050 states, 4045 states have (on average 1.226946847960445) internal successors, (4963), 4045 states have internal predecessors, (4963), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 4967 transitions. [2022-02-15 01:17:20,724 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 4967 transitions. Word has length 102 [2022-02-15 01:17:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 4050 states and 4967 transitions. [2022-02-15 01:17:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 01:17:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 4967 transitions. [2022-02-15 01:17:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:17:20,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:20,729 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:20,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:17:20,729 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1874137270, now seen corresponding path program 25 times [2022-02-15 01:17:20,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:20,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811632957] [2022-02-15 01:17:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:20,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:20,731 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:20,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:20,732 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:22,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:22,040 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 01:17:22,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:22,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811632957] [2022-02-15 01:17:22,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811632957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:22,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:22,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:17:22,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978411616] [2022-02-15 01:17:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:22,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:17:22,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:17:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:17:22,042 INFO L87 Difference]: Start difference. First operand 4050 states and 4967 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:30,686 INFO L93 Difference]: Finished difference Result 5824 states and 7211 transitions. [2022-02-15 01:17:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:17:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:17:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:30,691 INFO L225 Difference]: With dead ends: 5824 [2022-02-15 01:17:30,691 INFO L226 Difference]: Without dead ends: 4946 [2022-02-15 01:17:30,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:17:30,693 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 208 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:30,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 97 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:17:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-02-15 01:17:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 3813. [2022-02-15 01:17:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3808 states have (on average 1.221638655462185) internal successors, (4652), 3808 states have internal predecessors, (4652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 4656 transitions. [2022-02-15 01:17:36,267 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 4656 transitions. Word has length 102 [2022-02-15 01:17:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:36,267 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 4656 transitions. [2022-02-15 01:17:36,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 4656 transitions. [2022-02-15 01:17:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:17:36,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:36,271 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:36,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:17:36,271 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -753755636, now seen corresponding path program 26 times [2022-02-15 01:17:36,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:36,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572230205] [2022-02-15 01:17:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:36,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:36,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:36,274 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:38,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:38,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572230205] [2022-02-15 01:17:38,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572230205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:38,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:38,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:17:38,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969653378] [2022-02-15 01:17:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:38,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:17:38,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:17:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:17:38,210 INFO L87 Difference]: Start difference. First operand 3813 states and 4656 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:48,546 INFO L93 Difference]: Finished difference Result 5522 states and 6839 transitions. [2022-02-15 01:17:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:17:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:17:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:48,552 INFO L225 Difference]: With dead ends: 5522 [2022-02-15 01:17:48,552 INFO L226 Difference]: Without dead ends: 5275 [2022-02-15 01:17:48,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=525, Invalid=3135, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:17:48,553 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 313 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:48,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 127 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:17:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2022-02-15 01:17:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 4120. [2022-02-15 01:17:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 4115 states have (on average 1.2182260024301337) internal successors, (5013), 4115 states have internal predecessors, (5013), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5017 transitions. [2022-02-15 01:17:54,589 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5017 transitions. Word has length 102 [2022-02-15 01:17:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:54,590 INFO L470 AbstractCegarLoop]: Abstraction has 4120 states and 5017 transitions. [2022-02-15 01:17:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5017 transitions. [2022-02-15 01:17:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:17:54,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:54,594 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:54,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:17:54,594 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:54,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 27 times [2022-02-15 01:17:54,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:54,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205329390] [2022-02-15 01:17:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:54,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:54,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:54,597 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:55,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:55,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:55,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205329390] [2022-02-15 01:17:55,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [205329390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:55,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:55,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:17:55,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653676540] [2022-02-15 01:17:55,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:55,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:17:55,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:17:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:17:55,158 INFO L87 Difference]: Start difference. First operand 4120 states and 5017 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:18:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:02,776 INFO L93 Difference]: Finished difference Result 5332 states and 6549 transitions. [2022-02-15 01:18:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:18:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-15 01:18:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:02,781 INFO L225 Difference]: With dead ends: 5332 [2022-02-15 01:18:02,781 INFO L226 Difference]: Without dead ends: 4546 [2022-02-15 01:18:02,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:18:02,783 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 118 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:02,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 89 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:18:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2022-02-15 01:18:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4390. [2022-02-15 01:18:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 4385 states have (on average 1.2150513112884835) internal successors, (5328), 4385 states have internal predecessors, (5328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 5332 transitions. [2022-02-15 01:18:09,353 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 5332 transitions. Word has length 102 [2022-02-15 01:18:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:09,354 INFO L470 AbstractCegarLoop]: Abstraction has 4390 states and 5332 transitions. [2022-02-15 01:18:09,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:18:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 5332 transitions. [2022-02-15 01:18:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:18:09,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:09,357 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:09,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:18:09,357 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 28 times [2022-02-15 01:18:09,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:09,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758496318] [2022-02-15 01:18:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:09,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:09,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:09,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:09,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:10,693 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 01:18:10,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:10,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758496318] [2022-02-15 01:18:10,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758496318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:10,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:10,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:18:10,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502561075] [2022-02-15 01:18:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:18:10,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:18:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:18:10,694 INFO L87 Difference]: Start difference. First operand 4390 states and 5332 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:26,146 INFO L93 Difference]: Finished difference Result 10693 states and 13214 transitions. [2022-02-15 01:18:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:18:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:18:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:26,156 INFO L225 Difference]: With dead ends: 10693 [2022-02-15 01:18:26,156 INFO L226 Difference]: Without dead ends: 9170 [2022-02-15 01:18:26,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:18:26,159 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 342 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:26,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 80 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:18:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2022-02-15 01:18:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 5842. [2022-02-15 01:18:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5837 states have (on average 1.2122665752955286) internal successors, (7076), 5837 states have internal predecessors, (7076), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 7080 transitions. [2022-02-15 01:18:34,880 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 7080 transitions. Word has length 102 [2022-02-15 01:18:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:34,881 INFO L470 AbstractCegarLoop]: Abstraction has 5842 states and 7080 transitions. [2022-02-15 01:18:34,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 7080 transitions. [2022-02-15 01:18:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:18:34,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:34,885 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:34,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:18:34,885 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 29 times [2022-02-15 01:18:34,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:34,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395240028] [2022-02-15 01:18:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:34,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:34,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:34,888 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:35,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:35,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395240028] [2022-02-15 01:18:35,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395240028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:35,484 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:35,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:18:35,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857461347] [2022-02-15 01:18:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:35,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:18:35,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:18:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:18:35,485 INFO L87 Difference]: Start difference. First operand 5842 states and 7080 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:45,296 INFO L93 Difference]: Finished difference Result 9631 states and 11721 transitions. [2022-02-15 01:18:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:18:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:18:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:45,303 INFO L225 Difference]: With dead ends: 9631 [2022-02-15 01:18:45,303 INFO L226 Difference]: Without dead ends: 6280 [2022-02-15 01:18:45,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:18:45,307 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:45,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 81 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:18:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2022-02-15 01:18:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6184. [2022-02-15 01:18:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6179 states have (on average 1.2037546528564493) internal successors, (7438), 6179 states have internal predecessors, (7438), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 7442 transitions. [2022-02-15 01:18:54,336 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 7442 transitions. Word has length 102 [2022-02-15 01:18:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:54,336 INFO L470 AbstractCegarLoop]: Abstraction has 6184 states and 7442 transitions. [2022-02-15 01:18:54,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 7442 transitions. [2022-02-15 01:18:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:18:54,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:54,342 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:54,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:18:54,342 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 995036492, now seen corresponding path program 30 times [2022-02-15 01:18:54,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:54,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831638815] [2022-02-15 01:18:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:54,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:54,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:54,345 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:56,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:56,418 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:56,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831638815] [2022-02-15 01:18:56,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831638815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:56,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:56,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:18:56,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367990320] [2022-02-15 01:18:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:18:56,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:18:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:18:56,419 INFO L87 Difference]: Start difference. First operand 6184 states and 7442 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:12,253 INFO L93 Difference]: Finished difference Result 8897 states and 10811 transitions. [2022-02-15 01:19:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:19:12,253 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:19:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:12,262 INFO L225 Difference]: With dead ends: 8897 [2022-02-15 01:19:12,262 INFO L226 Difference]: Without dead ends: 8614 [2022-02-15 01:19:12,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=593, Invalid=3829, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:19:12,263 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 343 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:12,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 120 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:19:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2022-02-15 01:19:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 6499. [2022-02-15 01:19:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6494 states have (on average 1.2052663997536188) internal successors, (7827), 6494 states have internal predecessors, (7827), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 7831 transitions. [2022-02-15 01:19:21,799 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 7831 transitions. Word has length 102 [2022-02-15 01:19:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 6499 states and 7831 transitions. [2022-02-15 01:19:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 7831 transitions. [2022-02-15 01:19:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:19:21,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:21,804 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:21,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:19:21,804 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 602009482, now seen corresponding path program 31 times [2022-02-15 01:19:21,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:21,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73106063] [2022-02-15 01:19:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:21,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:21,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:21,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:21,807 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:22,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:22,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73106063] [2022-02-15 01:19:22,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [73106063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:22,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:22,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:19:22,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161191316] [2022-02-15 01:19:22,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:22,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:19:22,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:19:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:19:22,210 INFO L87 Difference]: Start difference. First operand 6499 states and 7831 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:31,871 INFO L93 Difference]: Finished difference Result 9817 states and 11910 transitions. [2022-02-15 01:19:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:19:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:19:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:31,878 INFO L225 Difference]: With dead ends: 9817 [2022-02-15 01:19:31,878 INFO L226 Difference]: Without dead ends: 6114 [2022-02-15 01:19:31,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:19:31,882 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 193 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:31,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 101 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:19:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6114 states. [2022-02-15 01:19:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6114 to 5993. [2022-02-15 01:19:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 5988 states have (on average 1.204241816967268) internal successors, (7211), 5988 states have internal predecessors, (7211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 7215 transitions. [2022-02-15 01:19:40,739 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 7215 transitions. Word has length 102 [2022-02-15 01:19:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:40,739 INFO L470 AbstractCegarLoop]: Abstraction has 5993 states and 7215 transitions. [2022-02-15 01:19:40,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 7215 transitions. [2022-02-15 01:19:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:19:40,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:40,743 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:40,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:19:40,743 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1902240840, now seen corresponding path program 32 times [2022-02-15 01:19:40,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:40,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906354307] [2022-02-15 01:19:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:40,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:40,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:40,746 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:41,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:41,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:41,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906354307] [2022-02-15 01:19:41,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906354307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:41,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:41,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:19:41,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646468831] [2022-02-15 01:19:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:19:41,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:19:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:19:41,285 INFO L87 Difference]: Start difference. First operand 5993 states and 7215 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:51,386 INFO L93 Difference]: Finished difference Result 7117 states and 8634 transitions. [2022-02-15 01:19:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:19:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:19:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:51,393 INFO L225 Difference]: With dead ends: 7117 [2022-02-15 01:19:51,393 INFO L226 Difference]: Without dead ends: 6226 [2022-02-15 01:19:51,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:19:51,395 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:51,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 110 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:19:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2022-02-15 01:19:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 5723. [2022-02-15 01:19:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5718 states have (on average 1.2061909758656872) internal successors, (6897), 5718 states have internal predecessors, (6897), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 6901 transitions. [2022-02-15 01:19:59,794 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 6901 transitions. Word has length 102 [2022-02-15 01:19:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:59,794 INFO L470 AbstractCegarLoop]: Abstraction has 5723 states and 6901 transitions. [2022-02-15 01:19:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 6901 transitions. [2022-02-15 01:19:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:19:59,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:59,798 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:59,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:19:59,798 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213830, now seen corresponding path program 33 times [2022-02-15 01:19:59,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:59,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452713080] [2022-02-15 01:19:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:59,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:59,804 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:59,805 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:01,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:01,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452713080] [2022-02-15 01:20:01,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [452713080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:01,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:01,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:20:01,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927186676] [2022-02-15 01:20:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:20:01,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:20:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:20:01,242 INFO L87 Difference]: Start difference. First operand 5723 states and 6901 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:13,756 INFO L93 Difference]: Finished difference Result 8168 states and 9925 transitions. [2022-02-15 01:20:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:20:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:20:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:13,764 INFO L225 Difference]: With dead ends: 8168 [2022-02-15 01:20:13,764 INFO L226 Difference]: Without dead ends: 6884 [2022-02-15 01:20:13,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=470, Invalid=2286, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:20:13,766 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 282 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:13,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 110 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:20:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2022-02-15 01:20:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 5424. [2022-02-15 01:20:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-15 01:20:21,829 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-15 01:20:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:21,829 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-15 01:20:21,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-15 01:20:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:20:21,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:21,833 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:21,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:20:21,833 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 34 times [2022-02-15 01:20:21,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:21,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481548254] [2022-02-15 01:20:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:21,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:21,835 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:21,836 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:22,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:22,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:22,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481548254] [2022-02-15 01:20:22,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [481548254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:22,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:22,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:20:22,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697683720] [2022-02-15 01:20:22,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:20:22,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:20:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:20:22,427 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:32,132 INFO L93 Difference]: Finished difference Result 6566 states and 7963 transitions. [2022-02-15 01:20:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:20:32,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:20:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:32,139 INFO L225 Difference]: With dead ends: 6566 [2022-02-15 01:20:32,139 INFO L226 Difference]: Without dead ends: 5783 [2022-02-15 01:20:32,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:20:32,141 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 126 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:32,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 105 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:20:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2022-02-15 01:20:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 5514. [2022-02-15 01:20:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5509 states have (on average 1.2043928117625704) internal successors, (6635), 5509 states have internal predecessors, (6635), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 6639 transitions. [2022-02-15 01:20:40,422 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 6639 transitions. Word has length 102 [2022-02-15 01:20:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:40,422 INFO L470 AbstractCegarLoop]: Abstraction has 5514 states and 6639 transitions. [2022-02-15 01:20:40,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 6639 transitions. [2022-02-15 01:20:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:20:40,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:40,426 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:40,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:20:40,426 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 35 times [2022-02-15 01:20:40,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:40,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585296987] [2022-02-15 01:20:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:40,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:40,428 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:40,442 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:40,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:40,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585296987] [2022-02-15 01:20:40,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585296987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:40,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:40,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:20:40,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379362893] [2022-02-15 01:20:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:40,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:20:40,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:20:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:20:40,999 INFO L87 Difference]: Start difference. First operand 5514 states and 6639 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:20:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:50,447 INFO L93 Difference]: Finished difference Result 6542 states and 7943 transitions. [2022-02-15 01:20:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:20:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-15 01:20:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:50,454 INFO L225 Difference]: With dead ends: 6542 [2022-02-15 01:20:50,454 INFO L226 Difference]: Without dead ends: 5675 [2022-02-15 01:20:50,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:20:50,455 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 129 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:50,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 83 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:20:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2022-02-15 01:20:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 5424. [2022-02-15 01:20:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-15 01:20:58,633 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-15 01:20:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:58,633 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-15 01:20:58,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 01:20:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-15 01:20:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:20:58,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:58,637 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:58,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:20:58,637 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 36 times [2022-02-15 01:20:58,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:58,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61090957] [2022-02-15 01:20:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:58,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:58,639 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:58,641 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:59,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:59,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:59,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61090957] [2022-02-15 01:20:59,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61090957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:59,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:59,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:20:59,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385505638] [2022-02-15 01:20:59,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:59,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:20:59,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:20:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:20:59,121 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:08,294 INFO L93 Difference]: Finished difference Result 6305 states and 7646 transitions. [2022-02-15 01:21:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:21:08,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:21:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:08,299 INFO L225 Difference]: With dead ends: 6305 [2022-02-15 01:21:08,299 INFO L226 Difference]: Without dead ends: 5522 [2022-02-15 01:21:08,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:21:08,301 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 148 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:08,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 87 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:21:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2022-02-15 01:21:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5424. [2022-02-15 01:21:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-15 01:21:16,520 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-15 01:21:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-15 01:21:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-15 01:21:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:21:16,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:16,524 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:16,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:21:16,525 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 37 times [2022-02-15 01:21:16,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:16,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340341415] [2022-02-15 01:21:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:16,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:16,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:16,528 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:17,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:17,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340341415] [2022-02-15 01:21:17,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [340341415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:17,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:17,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:21:17,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137527929] [2022-02-15 01:21:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:17,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:21:17,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:21:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:21:17,096 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 01:21:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:26,637 INFO L93 Difference]: Finished difference Result 8690 states and 10502 transitions. [2022-02-15 01:21:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:21:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 102 [2022-02-15 01:21:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:26,643 INFO L225 Difference]: With dead ends: 8690 [2022-02-15 01:21:26,643 INFO L226 Difference]: Without dead ends: 5812 [2022-02-15 01:21:26,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:21:26,646 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:26,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 74 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:21:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2022-02-15 01:21:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5514. [2022-02-15 01:21:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5509 states have (on average 1.1987656561989473) internal successors, (6604), 5509 states have internal predecessors, (6604), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 6608 transitions. [2022-02-15 01:21:35,069 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 6608 transitions. Word has length 102 [2022-02-15 01:21:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:35,069 INFO L470 AbstractCegarLoop]: Abstraction has 5514 states and 6608 transitions. [2022-02-15 01:21:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 01:21:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 6608 transitions. [2022-02-15 01:21:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:21:35,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:35,073 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:35,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:21:35,073 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 38 times [2022-02-15 01:21:35,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:35,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344070591] [2022-02-15 01:21:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:35,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:35,076 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:35,077 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:36,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:36,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344070591] [2022-02-15 01:21:36,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344070591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:36,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:36,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:21:36,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886593761] [2022-02-15 01:21:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:36,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:21:36,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:21:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:21:36,702 INFO L87 Difference]: Start difference. First operand 5514 states and 6608 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:54,749 INFO L93 Difference]: Finished difference Result 11114 states and 13649 transitions. [2022-02-15 01:21:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:21:54,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:21:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:54,760 INFO L225 Difference]: With dead ends: 11114 [2022-02-15 01:21:54,760 INFO L226 Difference]: Without dead ends: 10105 [2022-02-15 01:21:54,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=2370, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:21:54,762 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 450 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:54,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 116 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:21:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2022-02-15 01:22:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 6914. [2022-02-15 01:22:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 6909 states have (on average 1.2066869300911853) internal successors, (8337), 6909 states have internal predecessors, (8337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 8341 transitions. [2022-02-15 01:22:05,368 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 8341 transitions. Word has length 102 [2022-02-15 01:22:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:05,368 INFO L470 AbstractCegarLoop]: Abstraction has 6914 states and 8341 transitions. [2022-02-15 01:22:05,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 8341 transitions. [2022-02-15 01:22:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:22:05,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:05,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:05,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:22:05,373 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1904666614, now seen corresponding path program 39 times [2022-02-15 01:22:05,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:05,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623122858] [2022-02-15 01:22:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:05,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:05,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:05,376 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:05,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:05,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:05,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623122858] [2022-02-15 01:22:05,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623122858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:05,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:05,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:22:05,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782604529] [2022-02-15 01:22:05,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:05,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:22:05,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:22:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:22:05,979 INFO L87 Difference]: Start difference. First operand 6914 states and 8341 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:18,021 INFO L93 Difference]: Finished difference Result 11368 states and 13796 transitions. [2022-02-15 01:22:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:22:18,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:22:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:18,030 INFO L225 Difference]: With dead ends: 11368 [2022-02-15 01:22:18,030 INFO L226 Difference]: Without dead ends: 7329 [2022-02-15 01:22:18,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:22:18,035 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:18,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 87 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:22:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2022-02-15 01:22:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 6572. [2022-02-15 01:22:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 6567 states have (on average 1.2165372316126084) internal successors, (7989), 6567 states have internal predecessors, (7989), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 7993 transitions. [2022-02-15 01:22:28,290 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 7993 transitions. Word has length 102 [2022-02-15 01:22:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:28,290 INFO L470 AbstractCegarLoop]: Abstraction has 6572 states and 7993 transitions. [2022-02-15 01:22:28,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 7993 transitions. [2022-02-15 01:22:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:22:28,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:28,294 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:28,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:22:28,294 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:28,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 610412102, now seen corresponding path program 40 times [2022-02-15 01:22:28,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:28,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023105369] [2022-02-15 01:22:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:28,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:28,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:28,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:30,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:30,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:30,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023105369] [2022-02-15 01:22:30,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023105369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:30,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:30,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:22:30,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182293286] [2022-02-15 01:22:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:30,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:22:30,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:22:30,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:22:30,058 INFO L87 Difference]: Start difference. First operand 6572 states and 7993 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:45,260 INFO L93 Difference]: Finished difference Result 8559 states and 10468 transitions. [2022-02-15 01:22:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:22:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:22:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:45,269 INFO L225 Difference]: With dead ends: 8559 [2022-02-15 01:22:45,269 INFO L226 Difference]: Without dead ends: 8309 [2022-02-15 01:22:45,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:22:45,271 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 308 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:45,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 71 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:22:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8309 states. [2022-02-15 01:22:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8309 to 6858. [2022-02-15 01:22:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6853 states have (on average 1.2128994600904712) internal successors, (8312), 6853 states have internal predecessors, (8312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 8316 transitions. [2022-02-15 01:22:55,938 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 8316 transitions. Word has length 102 [2022-02-15 01:22:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:55,938 INFO L470 AbstractCegarLoop]: Abstraction has 6858 states and 8316 transitions. [2022-02-15 01:22:55,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 8316 transitions. [2022-02-15 01:22:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:22:55,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:55,943 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:55,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:22:55,943 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 416633098, now seen corresponding path program 41 times [2022-02-15 01:22:55,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:55,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897058026] [2022-02-15 01:22:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:55,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:55,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:55,947 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:57,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:57,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897058026] [2022-02-15 01:22:57,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [897058026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:57,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:57,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:22:57,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542125519] [2022-02-15 01:22:57,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:57,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:22:57,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:22:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:22:57,538 INFO L87 Difference]: Start difference. First operand 6858 states and 8316 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:18,317 INFO L93 Difference]: Finished difference Result 12771 states and 15726 transitions. [2022-02-15 01:23:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:23:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:23:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:18,329 INFO L225 Difference]: With dead ends: 12771 [2022-02-15 01:23:18,329 INFO L226 Difference]: Without dead ends: 11774 [2022-02-15 01:23:18,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:23:18,332 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 345 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:18,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 107 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:23:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2022-02-15 01:23:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 8207. [2022-02-15 01:23:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8207 states, 8202 states have (on average 1.2217751767861498) internal successors, (10021), 8202 states have internal predecessors, (10021), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 10025 transitions. [2022-02-15 01:23:31,170 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 10025 transitions. Word has length 102 [2022-02-15 01:23:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:31,170 INFO L470 AbstractCegarLoop]: Abstraction has 8207 states and 10025 transitions. [2022-02-15 01:23:31,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 10025 transitions. [2022-02-15 01:23:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:23:31,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:31,175 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:31,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:23:31,175 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash 725205962, now seen corresponding path program 42 times [2022-02-15 01:23:31,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:31,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774651595] [2022-02-15 01:23:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:31,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:31,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:31,178 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:31,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:31,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774651595] [2022-02-15 01:23:31,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [774651595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:31,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:31,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:23:31,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841955653] [2022-02-15 01:23:31,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:31,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:23:31,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:23:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:23:31,636 INFO L87 Difference]: Start difference. First operand 8207 states and 10025 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:45,335 INFO L93 Difference]: Finished difference Result 13349 states and 16405 transitions. [2022-02-15 01:23:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:23:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:23:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:45,344 INFO L225 Difference]: With dead ends: 13349 [2022-02-15 01:23:45,344 INFO L226 Difference]: Without dead ends: 8535 [2022-02-15 01:23:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:23:45,349 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 53 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:23:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8535 states. [2022-02-15 01:23:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8535 to 8426. [2022-02-15 01:23:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 8421 states have (on average 1.215770098563116) internal successors, (10238), 8421 states have internal predecessors, (10238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 10242 transitions. [2022-02-15 01:23:58,648 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 10242 transitions. Word has length 102 [2022-02-15 01:23:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 8426 states and 10242 transitions. [2022-02-15 01:23:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 10242 transitions. [2022-02-15 01:23:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:23:58,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:58,654 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:58,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:23:58,654 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 44957194, now seen corresponding path program 43 times [2022-02-15 01:23:58,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:58,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144605002] [2022-02-15 01:23:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:58,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:58,660 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:58,662 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:00,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:00,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144605002] [2022-02-15 01:24:00,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [144605002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:00,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:00,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:24:00,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92566170] [2022-02-15 01:24:00,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:00,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:24:00,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:24:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:24:00,045 INFO L87 Difference]: Start difference. First operand 8426 states and 10242 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 01:24:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:16,409 INFO L93 Difference]: Finished difference Result 9589 states and 11711 transitions. [2022-02-15 01:24:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:24:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 102 [2022-02-15 01:24:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:16,420 INFO L225 Difference]: With dead ends: 9589 [2022-02-15 01:24:16,420 INFO L226 Difference]: Without dead ends: 9307 [2022-02-15 01:24:16,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=331, Invalid=1309, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:24:16,422 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 276 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:16,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 91 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:24:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2022-02-15 01:24:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 8426. [2022-02-15 01:24:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 8421 states have (on average 1.2151763448521553) internal successors, (10233), 8421 states have internal predecessors, (10233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 10237 transitions. [2022-02-15 01:24:29,676 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 10237 transitions. Word has length 102 [2022-02-15 01:24:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:29,676 INFO L470 AbstractCegarLoop]: Abstraction has 8426 states and 10237 transitions. [2022-02-15 01:24:29,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 01:24:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 10237 transitions. [2022-02-15 01:24:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:24:29,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:29,682 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:24:29,682 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1497426230, now seen corresponding path program 44 times [2022-02-15 01:24:29,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:29,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902381638] [2022-02-15 01:24:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:29,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:29,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:29,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:29,685 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:30,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:30,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902381638] [2022-02-15 01:24:30,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1902381638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:30,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:30,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:24:30,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858977830] [2022-02-15 01:24:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:24:30,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:30,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:24:30,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:24:30,168 INFO L87 Difference]: Start difference. First operand 8426 states and 10237 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 01:24:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:44,776 INFO L93 Difference]: Finished difference Result 11584 states and 14118 transitions. [2022-02-15 01:24:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:24:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 102 [2022-02-15 01:24:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:44,786 INFO L225 Difference]: With dead ends: 11584 [2022-02-15 01:24:44,786 INFO L226 Difference]: Without dead ends: 9005 [2022-02-15 01:24:44,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:24:44,789 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:44,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:24:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2022-02-15 01:24:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 8744. [2022-02-15 01:24:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8744 states, 8739 states have (on average 1.212610138459778) internal successors, (10597), 8739 states have internal predecessors, (10597), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8744 states to 8744 states and 10601 transitions. [2022-02-15 01:24:58,822 INFO L78 Accepts]: Start accepts. Automaton has 8744 states and 10601 transitions. Word has length 102 [2022-02-15 01:24:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 8744 states and 10601 transitions. [2022-02-15 01:24:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 01:24:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8744 states and 10601 transitions. [2022-02-15 01:24:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:24:58,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:58,828 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:58,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:24:58,828 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1558120830, now seen corresponding path program 45 times [2022-02-15 01:24:58,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:58,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780878643] [2022-02-15 01:24:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:58,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:58,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:58,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:00,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:00,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780878643] [2022-02-15 01:25:00,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780878643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:00,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:00,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:25:00,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908086107] [2022-02-15 01:25:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:00,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:25:00,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:25:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:25:00,025 INFO L87 Difference]: Start difference. First operand 8744 states and 10601 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:20,699 INFO L93 Difference]: Finished difference Result 12370 states and 15121 transitions. [2022-02-15 01:25:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:25:20,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:25:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:20,712 INFO L225 Difference]: With dead ends: 12370 [2022-02-15 01:25:20,712 INFO L226 Difference]: Without dead ends: 11797 [2022-02-15 01:25:20,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:25:20,714 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 370 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 78 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:25:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11797 states. [2022-02-15 01:25:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11797 to 9275. [2022-02-15 01:25:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9270 states have (on average 1.211111111111111) internal successors, (11227), 9270 states have internal predecessors, (11227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 11231 transitions. [2022-02-15 01:25:35,186 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 11231 transitions. Word has length 102 [2022-02-15 01:25:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:35,186 INFO L470 AbstractCegarLoop]: Abstraction has 9275 states and 11231 transitions. [2022-02-15 01:25:35,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 11231 transitions. [2022-02-15 01:25:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:25:35,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:35,192 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:25:35,192 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1194463042, now seen corresponding path program 46 times [2022-02-15 01:25:35,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:35,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751023102] [2022-02-15 01:25:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:35,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:35,194 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:35,196 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:35,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:35,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751023102] [2022-02-15 01:25:35,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751023102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:35,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:35,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:25:35,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738830624] [2022-02-15 01:25:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:35,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:25:35,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:25:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:25:35,722 INFO L87 Difference]: Start difference. First operand 9275 states and 11231 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 01:25:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:51,355 INFO L93 Difference]: Finished difference Result 12832 states and 15562 transitions. [2022-02-15 01:25:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:25:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 102 [2022-02-15 01:25:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:51,366 INFO L225 Difference]: With dead ends: 12832 [2022-02-15 01:25:51,366 INFO L226 Difference]: Without dead ends: 9768 [2022-02-15 01:25:51,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:25:51,371 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:51,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:25:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2022-02-15 01:26:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 9458. [2022-02-15 01:26:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9458 states, 9453 states have (on average 1.2063895059769385) internal successors, (11404), 9453 states have internal predecessors, (11404), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:26:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9458 states to 9458 states and 11408 transitions. [2022-02-15 01:26:06,159 INFO L78 Accepts]: Start accepts. Automaton has 9458 states and 11408 transitions. Word has length 102 [2022-02-15 01:26:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:26:06,159 INFO L470 AbstractCegarLoop]: Abstraction has 9458 states and 11408 transitions. [2022-02-15 01:26:06,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 01:26:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9458 states and 11408 transitions. [2022-02-15 01:26:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:26:06,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:26:06,166 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:26:06,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:26:06,166 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:26:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:26:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1787981558, now seen corresponding path program 47 times [2022-02-15 01:26:06,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:26:06,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145536337] [2022-02-15 01:26:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:26:06,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:26:06,168 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:26:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:26:06,169 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:26:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:07,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:26:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:26:07,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:26:07,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145536337] [2022-02-15 01:26:07,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145536337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:26:07,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:26:07,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:26:07,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891520777] [2022-02-15 01:26:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:26:07,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:26:07,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:26:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:26:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:26:07,470 INFO L87 Difference]: Start difference. First operand 9458 states and 11408 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 01:26:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:26:28,977 INFO L93 Difference]: Finished difference Result 13271 states and 16183 transitions. [2022-02-15 01:26:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:26:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 102 [2022-02-15 01:26:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:26:28,989 INFO L225 Difference]: With dead ends: 13271 [2022-02-15 01:26:28,989 INFO L226 Difference]: Without dead ends: 12176 [2022-02-15 01:26:28,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:26:28,992 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 353 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:26:28,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 110 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:26:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12176 states. [2022-02-15 01:26:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12176 to 9455. [2022-02-15 01:26:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 9450 states have (on average 1.2038095238095239) internal successors, (11376), 9450 states have internal predecessors, (11376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:26:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 11380 transitions. [2022-02-15 01:26:43,956 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 11380 transitions. Word has length 102 [2022-02-15 01:26:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:26:43,956 INFO L470 AbstractCegarLoop]: Abstraction has 9455 states and 11380 transitions. [2022-02-15 01:26:43,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 01:26:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 11380 transitions. [2022-02-15 01:26:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:26:43,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:26:43,962 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:26:43,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:26:43,962 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:26:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:26:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash 964602314, now seen corresponding path program 48 times [2022-02-15 01:26:43,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:26:43,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476647088] [2022-02-15 01:26:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:26:43,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:26:43,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:26:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:26:43,965 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:26:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:26:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:26:44,766 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:26:44,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476647088] [2022-02-15 01:26:44,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476647088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:26:44,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:26:44,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:26:44,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880431139] [2022-02-15 01:26:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:26:44,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:26:44,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:26:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:26:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:26:44,767 INFO L87 Difference]: Start difference. First operand 9455 states and 11380 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 01:27:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:04,343 INFO L93 Difference]: Finished difference Result 16311 states and 19784 transitions. [2022-02-15 01:27:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:27:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 102 [2022-02-15 01:27:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:04,355 INFO L225 Difference]: With dead ends: 16311 [2022-02-15 01:27:04,355 INFO L226 Difference]: Without dead ends: 11332 [2022-02-15 01:27:04,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:27:04,362 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:04,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 79 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11332 states.