/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/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:10,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:10,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:10,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:01:10,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:10,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:10,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:10,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:10,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:10,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:10,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:10,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:10,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:10,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:10,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:10,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:10,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:01:10,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:10,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:10,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:10,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:01:10,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:10,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:10,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:10,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:10,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:10,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:10,778 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:10,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:10,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:10,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:10,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:10,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:10,969 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:10,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2022-01-31 17:01:11,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539455dee/f590b31bfd5940ecb64cdf2615f79d19/FLAG4cf7d104b [2022-01-31 17:01:11,386 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:11,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2022-01-31 17:01:11,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539455dee/f590b31bfd5940ecb64cdf2615f79d19/FLAG4cf7d104b [2022-01-31 17:01:11,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539455dee/f590b31bfd5940ecb64cdf2615f79d19 [2022-01-31 17:01:11,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:11,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:11,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:11,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:11,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd54d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:11,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:11,540 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i[820,833] [2022-01-31 17:01:11,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,557 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:11,569 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i[820,833] [2022-01-31 17:01:11,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,585 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:11,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11 WrapperNode [2022-01-31 17:01:11,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:11,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:11,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:11,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:11,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:11,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:11,696 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) [2022-01-31 17:01:11,723 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 [2022-01-31 17:01:11,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:11,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:11,824 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:11,826 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:12,012 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:12,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:12,017 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:01:12,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:12 BoogieIcfgContainer [2022-01-31 17:01:12,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:12,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:12,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:12,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:12,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:11" (1/3) ... [2022-01-31 17:01:12,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d02e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:12, skipping insertion in model container [2022-01-31 17:01:12,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (2/3) ... [2022-01-31 17:01:12,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746d02e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:12, skipping insertion in model container [2022-01-31 17:01:12,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:12" (3/3) ... [2022-01-31 17:01:12,025 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2022-01-31 17:01:12,029 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:12,029 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:12,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:12,089 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 [2022-01-31 17:01:12,090 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-01-31 17:01:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:12,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 498599300, now seen corresponding path program 1 times [2022-01-31 17:01:12,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126339942] [2022-01-31 17:01:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126339942] [2022-01-31 17:01:12,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [126339942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:01:12,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495278979] [2022-01-31 17:01:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:01:12,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:01:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:01:12,294 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,357 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-01-31 17:01:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:01:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:01:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,365 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:01:12,365 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 17:01:12,367 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 [2022-01-31 17:01:12,370 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 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 [2022-01-31 17:01:12,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 17:01:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 17:01:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-31 17:01:12,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2022-01-31 17:01:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,406 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-31 17:01:12,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-31 17:01:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:12,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:12,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 247748289, now seen corresponding path program 1 times [2022-01-31 17:01:12,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774810320] [2022-01-31 17:01:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774810320] [2022-01-31 17:01:12,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1774810320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:12,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993910090] [2022-01-31 17:01:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:12,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:12,460 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,523 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-31 17:01:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:01:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,524 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:01:12,524 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:01:12,525 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 [2022-01-31 17:01:12,526 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:01:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 17:01:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 17:01:12,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2022-01-31 17:01:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,535 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 17:01:12,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 17:01:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 17:01:12,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:12,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1572069859, now seen corresponding path program 1 times [2022-01-31 17:01:12,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087265927] [2022-01-31 17:01:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087265927] [2022-01-31 17:01:12,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087265927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:12,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344144714] [2022-01-31 17:01:12,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:12,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,630 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,703 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-31 17:01:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 17:01:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,705 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:01:12,705 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:01:12,705 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 [2022-01-31 17:01:12,706 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:01:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 17:01:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 17:01:12,713 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2022-01-31 17:01:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,713 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 17:01:12,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 17:01:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:01:12,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:12,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1360188283, now seen corresponding path program 2 times [2022-01-31 17:01:12,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139335320] [2022-01-31 17:01:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,718 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139335320] [2022-01-31 17:01:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139335320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:12,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720943126] [2022-01-31 17:01:12,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:12,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:12,802 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,876 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-01-31 17:01:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 17:01:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,878 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:01:12,878 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 17:01:12,878 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 [2022-01-31 17:01:12,880 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 17:01:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 17:01:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-31 17:01:12,887 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2022-01-31 17:01:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,887 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-31 17:01:12,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-31 17:01:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:01:12,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,888 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] [2022-01-31 17:01:12,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:12,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1481984524, now seen corresponding path program 1 times [2022-01-31 17:01:12,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56675183] [2022-01-31 17:01:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56675183] [2022-01-31 17:01:12,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56675183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:12,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716315364] [2022-01-31 17:01:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:12,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:12,942 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,012 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-01-31 17:01:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 17:01:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,014 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:01:13,014 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:01:13,015 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 [2022-01-31 17:01:13,016 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:01:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-01-31 17:01:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 17:01:13,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2022-01-31 17:01:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,023 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 17:01:13,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 17:01:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:01:13,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:13,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,025 INFO L85 PathProgramCache]: Analyzing trace with hash -490586619, now seen corresponding path program 1 times [2022-01-31 17:01:13,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767701591] [2022-01-31 17:01:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767701591] [2022-01-31 17:01:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767701591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72342045] [2022-01-31 17:01:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,084 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-01-31 17:01:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,162 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2022-01-31 17:01:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:01:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,165 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:01:13,165 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:01:13,166 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 [2022-01-31 17:01:13,175 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:01:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-01-31 17:01:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-01-31 17:01:13,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 25 [2022-01-31 17:01:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,185 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-01-31 17:01:13,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-01-31 17:01:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-01-31 17:01:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:01:13,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:13,186 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1614963860, now seen corresponding path program 2 times [2022-01-31 17:01:13,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074022874] [2022-01-31 17:01:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074022874] [2022-01-31 17:01:13,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074022874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933309783] [2022-01-31 17:01:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,254 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,344 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-01-31 17:01:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 17:01:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,350 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:01:13,350 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:01:13,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:13,353 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:01:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-01-31 17:01:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 17:01:13,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 28 [2022-01-31 17:01:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 17:01:13,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 17:01:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:01:13,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:13,371 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1487408987, now seen corresponding path program 3 times [2022-01-31 17:01:13,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469742178] [2022-01-31 17:01:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469742178] [2022-01-31 17:01:13,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [469742178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357645637] [2022-01-31 17:01:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,469 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2022-01-31 17:01:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,539 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-01-31 17:01:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 31 [2022-01-31 17:01:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,543 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:01:13,543 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:01:13,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:13,546 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:01:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 17:01:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-01-31 17:01:13,563 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2022-01-31 17:01:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-01-31 17:01:13,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2022-01-31 17:01:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-01-31 17:01:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:01:13,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:13,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash -446661309, now seen corresponding path program 4 times [2022-01-31 17:01:13,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100969883] [2022-01-31 17:01:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100969883] [2022-01-31 17:01:13,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100969883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:13,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864746108] [2022-01-31 17:01:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:13,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,646 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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) [2022-01-31 17:01:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,713 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-01-31 17:01:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 33 [2022-01-31 17:01:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,715 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:01:13,715 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:01:13,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:13,717 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:01:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 17:01:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-01-31 17:01:13,733 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2022-01-31 17:01:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-01-31 17:01:13,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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) [2022-01-31 17:01:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-01-31 17:01:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:01:13,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:13,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1015522719, now seen corresponding path program 5 times [2022-01-31 17:01:13,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420238202] [2022-01-31 17:01:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420238202] [2022-01-31 17:01:13,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420238202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:13,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088977412] [2022-01-31 17:01:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:13,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:13,864 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2022-01-31 17:01:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,945 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 17:01:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 35 [2022-01-31 17:01:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,946 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:01:13,946 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:01:13,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:13,948 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:01:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 17:01:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-31 17:01:13,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2022-01-31 17:01:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,963 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-31 17:01:13,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2022-01-31 17:01:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-31 17:01:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:13,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,967 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:13,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2064476159, now seen corresponding path program 6 times [2022-01-31 17:01:13,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713376739] [2022-01-31 17:01:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713376739] [2022-01-31 17:01:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713376739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:14,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888373183] [2022-01-31 17:01:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:14,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,061 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,175 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-01-31 17:01:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 17:01:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,177 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:01:14,177 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:01:14,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:14,180 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:01:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 17:01:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-01-31 17:01:14,194 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 37 [2022-01-31 17:01:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,194 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-01-31 17:01:14,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-01-31 17:01:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:01:14,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,198 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:14,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1584036323, now seen corresponding path program 7 times [2022-01-31 17:01:14,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935380643] [2022-01-31 17:01:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,204 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935380643] [2022-01-31 17:01:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935380643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756974696] [2022-01-31 17:01:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:14,296 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2022-01-31 17:01:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,405 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-01-31 17:01:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 39 [2022-01-31 17:01:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,406 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:01:14,406 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:01:14,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:14,407 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:01:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 17:01:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 17:01:14,415 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 39 [2022-01-31 17:01:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,416 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 17:01:14,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2022-01-31 17:01:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 17:01:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:14,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,416 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:14,417 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1183749307, now seen corresponding path program 8 times [2022-01-31 17:01:14,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806435685] [2022-01-31 17:01:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,420 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806435685] [2022-01-31 17:01:14,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806435685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:14,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298735686] [2022-01-31 17:01:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:14,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:14,509 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2022-01-31 17:01:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,629 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-01-31 17:01:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 41 [2022-01-31 17:01:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,630 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:01:14,630 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:01:14,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:14,632 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:01:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 17:01:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 17:01:14,642 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 41 [2022-01-31 17:01:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,643 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 17:01:14,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2022-01-31 17:01:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 17:01:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:01:14,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,644 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:14,644 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1853983783, now seen corresponding path program 9 times [2022-01-31 17:01:14,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171442483] [2022-01-31 17:01:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,650 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,650 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171442483] [2022-01-31 17:01:14,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171442483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:14,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622888459] [2022-01-31 17:01:14,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:14,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:14,740 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,881 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-01-31 17:01:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:01:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,882 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:01:14,882 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:01:14,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:14,883 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:01:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-01-31 17:01:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-01-31 17:01:14,888 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 43 [2022-01-31 17:01:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,889 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-01-31 17:01:14,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-01-31 17:01:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:01:14,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,889 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:14,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash -537721993, now seen corresponding path program 10 times [2022-01-31 17:01:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116799550] [2022-01-31 17:01:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116799550] [2022-01-31 17:01:14,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116799550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:14,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143708075] [2022-01-31 17:01:14,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:14,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:14,982 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-31 17:01:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,143 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-01-31 17:01:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 45 [2022-01-31 17:01:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,146 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:01:15,146 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:01:15,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:15,148 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:01:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-31 17:01:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-01-31 17:01:15,155 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 45 [2022-01-31 17:01:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,155 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-01-31 17:01:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-31 17:01:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-01-31 17:01:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:01:15,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,156 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] [2022-01-31 17:01:15,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:15,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1669473173, now seen corresponding path program 11 times [2022-01-31 17:01:15,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243100297] [2022-01-31 17:01:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243100297] [2022-01-31 17:01:15,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243100297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:01:15,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513305592] [2022-01-31 17:01:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:01:15,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:01:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:15,304 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-01-31 17:01:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,474 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-01-31 17:01:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 47 [2022-01-31 17:01:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,475 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:01:15,476 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:01:15,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:15,477 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:01:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 17:01:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-01-31 17:01:15,483 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 47 [2022-01-31 17:01:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,483 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-01-31 17:01:15,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-01-31 17:01:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-01-31 17:01:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:01:15,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,484 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:15,484 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1070183475, now seen corresponding path program 12 times [2022-01-31 17:01:15,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373293183] [2022-01-31 17:01:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373293183] [2022-01-31 17:01:15,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373293183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:15,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239270285] [2022-01-31 17:01:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:15,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:15,612 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,801 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-01-31 17:01:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 17:01:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,802 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:01:15,802 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:01:15,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:15,803 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 45 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:01:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 17:01:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-01-31 17:01:15,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 49 [2022-01-31 17:01:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,809 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-01-31 17:01:15,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-01-31 17:01:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:15,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,810 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:15,810 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash 678401361, now seen corresponding path program 13 times [2022-01-31 17:01:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235428606] [2022-01-31 17:01:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235428606] [2022-01-31 17:01:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [235428606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366412335] [2022-01-31 17:01:15,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:15,932 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-01-31 17:01:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,130 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 17:01:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 51 [2022-01-31 17:01:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,131 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:01:16,131 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:01:16,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:16,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:01:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 17:01:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-01-31 17:01:16,139 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 51 [2022-01-31 17:01:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,139 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-01-31 17:01:16,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-01-31 17:01:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-01-31 17:01:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:01:16,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,139 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:16,140 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2132911855, now seen corresponding path program 14 times [2022-01-31 17:01:16,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939753117] [2022-01-31 17:01:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,143 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939753117] [2022-01-31 17:01:16,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939753117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:16,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027950618] [2022-01-31 17:01:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:16,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:16,275 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,519 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-01-31 17:01:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:01:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 17:01:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,520 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:01:16,520 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:01:16,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:16,522 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 45 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:01:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-01-31 17:01:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-01-31 17:01:16,528 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 53 [2022-01-31 17:01:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,528 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-01-31 17:01:16,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-01-31 17:01:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:01:16,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,529 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:16,529 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash -241841907, now seen corresponding path program 15 times [2022-01-31 17:01:16,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447881264] [2022-01-31 17:01:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447881264] [2022-01-31 17:01:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447881264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:16,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418403203] [2022-01-31 17:01:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:16,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:16,710 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2022-01-31 17:01:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,958 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2022-01-31 17:01:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 55 [2022-01-31 17:01:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,959 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:01:16,959 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:01:16,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:16,961 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:01:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 17:01:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 17:01:16,968 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 55 [2022-01-31 17:01:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,968 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 17:01:16,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2022-01-31 17:01:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 17:01:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:01:16,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,969 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:16,969 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1752573013, now seen corresponding path program 16 times [2022-01-31 17:01:16,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333542580] [2022-01-31 17:01:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333542580] [2022-01-31 17:01:17,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333542580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:17,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965316927] [2022-01-31 17:01:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:17,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:17,142 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,400 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-01-31 17:01:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 17:01:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,401 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:01:17,401 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:01:17,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:17,402 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 45 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:01:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-31 17:01:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-01-31 17:01:17,410 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 57 [2022-01-31 17:01:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,410 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-01-31 17:01:17,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-01-31 17:01:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:01:17,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,411 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:17,411 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1866219831, now seen corresponding path program 17 times [2022-01-31 17:01:17,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832633182] [2022-01-31 17:01:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832633182] [2022-01-31 17:01:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [832633182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:01:17,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411554095] [2022-01-31 17:01:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:01:17,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:01:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:17,624 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-01-31 17:01:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,920 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-01-31 17:01:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 59 [2022-01-31 17:01:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,923 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:01:17,923 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:01:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:17,924 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 55 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:01:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-01-31 17:01:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-01-31 17:01:17,932 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 59 [2022-01-31 17:01:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-01-31 17:01:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-01-31 17:01:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-01-31 17:01:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:01:17,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,933 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:17,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash 588337767, now seen corresponding path program 18 times [2022-01-31 17:01:17,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95497010] [2022-01-31 17:01:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:18,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95497010] [2022-01-31 17:01:18,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95497010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:18,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281915215] [2022-01-31 17:01:18,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:18,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:18,176 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-01-31 17:01:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,492 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-01-31 17:01:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:01:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 61 [2022-01-31 17:01:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,494 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:01:18,494 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:01:18,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:18,495 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 45 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:01:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-01-31 17:01:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 17:01:18,505 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 61 [2022-01-31 17:01:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 17:01:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-01-31 17:01:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 17:01:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:01:18,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,506 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:18,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1481143941, now seen corresponding path program 19 times [2022-01-31 17:01:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087954835] [2022-01-31 17:01:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:18,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087954835] [2022-01-31 17:01:18,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087954835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:01:18,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135613340] [2022-01-31 17:01:18,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:01:18,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:01:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:18,742 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2022-01-31 17:01:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,077 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2022-01-31 17:01:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 63 [2022-01-31 17:01:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,078 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:01:19,078 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:01:19,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:19,079 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:01:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 17:01:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-01-31 17:01:19,088 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 63 [2022-01-31 17:01:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,088 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-01-31 17:01:19,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2022-01-31 17:01:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-01-31 17:01:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:01:19,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,089 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:19,089 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash 474417955, now seen corresponding path program 20 times [2022-01-31 17:01:19,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728847782] [2022-01-31 17:01:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728847782] [2022-01-31 17:01:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [728847782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:01:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795239004] [2022-01-31 17:01:19,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:01:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:01:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:19,330 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2022-01-31 17:01:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,675 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-01-31 17:01:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:01:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 65 [2022-01-31 17:01:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,677 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:01:19,678 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:01:19,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:19,679 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 50 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:01:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-31 17:01:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-01-31 17:01:19,688 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 65 [2022-01-31 17:01:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,688 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-01-31 17:01:19,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2022-01-31 17:01:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-01-31 17:01:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:01:19,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,689 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:19,689 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash -621612991, now seen corresponding path program 21 times [2022-01-31 17:01:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693825775] [2022-01-31 17:01:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,942 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693825775] [2022-01-31 17:01:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693825775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993670527] [2022-01-31 17:01:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:19,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:19,944 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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) [2022-01-31 17:01:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,286 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2022-01-31 17:01:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:01:20,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 67 [2022-01-31 17:01:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,287 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:01:20,288 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:01:20,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:20,289 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 50 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:01:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 17:01:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-01-31 17:01:20,298 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 67 [2022-01-31 17:01:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,298 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-01-31 17:01:20,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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) [2022-01-31 17:01:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-01-31 17:01:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:01:20,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,299 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:20,299 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1640364577, now seen corresponding path program 22 times [2022-01-31 17:01:20,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593277964] [2022-01-31 17:01:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:20,560 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593277964] [2022-01-31 17:01:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593277964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:01:20,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096300199] [2022-01-31 17:01:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:01:20,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:01:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:20,562 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-01-31 17:01:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,959 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-01-31 17:01:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:01:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 69 [2022-01-31 17:01:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,961 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:01:20,961 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:01:20,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:20,962 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 55 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:01:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-31 17:01:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-01-31 17:01:20,971 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 69 [2022-01-31 17:01:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,971 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-01-31 17:01:20,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-01-31 17:01:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-01-31 17:01:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:01:20,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,972 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:20,972 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1408095235, now seen corresponding path program 23 times [2022-01-31 17:01:20,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527221633] [2022-01-31 17:01:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,976 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527221633] [2022-01-31 17:01:21,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527221633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:01:21,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586079167] [2022-01-31 17:01:21,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:01:21,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:01:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:21,247 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-01-31 17:01:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,627 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-01-31 17:01:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 71 [2022-01-31 17:01:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,628 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:01:21,628 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:01:21,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:01:21,629 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:01:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-01-31 17:01:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-01-31 17:01:21,639 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 71 [2022-01-31 17:01:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,639 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-01-31 17:01:21,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-01-31 17:01:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-01-31 17:01:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:01:21,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,640 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:21,640 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1535556965, now seen corresponding path program 24 times [2022-01-31 17:01:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799317275] [2022-01-31 17:01:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799317275] [2022-01-31 17:01:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799317275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:01:21,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60719066] [2022-01-31 17:01:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:01:21,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:01:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:21,946 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 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) [2022-01-31 17:01:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,407 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-01-31 17:01:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:01:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 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 73 [2022-01-31 17:01:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,408 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:01:22,408 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:01:22,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:22,410 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:01:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-01-31 17:01:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-01-31 17:01:22,419 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 73 [2022-01-31 17:01:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,420 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-01-31 17:01:22,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 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) [2022-01-31 17:01:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-01-31 17:01:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:01:22,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,423 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:22,424 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 527772089, now seen corresponding path program 25 times [2022-01-31 17:01:22,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141583131] [2022-01-31 17:01:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:22,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141583131] [2022-01-31 17:01:22,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141583131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:01:22,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675588258] [2022-01-31 17:01:22,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:01:22,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:01:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:22,740 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2022-01-31 17:01:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,188 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-01-31 17:01:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:01:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 75 [2022-01-31 17:01:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,189 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:01:23,189 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 17:01:23,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:01:23,190 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 40 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 17:01:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 17:01:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 85 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-01-31 17:01:23,202 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 75 [2022-01-31 17:01:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-01-31 17:01:23,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2022-01-31 17:01:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-01-31 17:01:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:01:23,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,203 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:23,203 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash -887897769, now seen corresponding path program 26 times [2022-01-31 17:01:23,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872421505] [2022-01-31 17:01:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:23,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872421505] [2022-01-31 17:01:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872421505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:01:23,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715902917] [2022-01-31 17:01:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:01:23,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:01:23,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:23,517 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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) [2022-01-31 17:01:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,933 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-01-31 17:01:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:01:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 77 [2022-01-31 17:01:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,934 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:01:23,934 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:01:23,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:01:23,936 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 45 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:01:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-31 17:01:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-01-31 17:01:23,945 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 77 [2022-01-31 17:01:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,945 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-01-31 17:01:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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) [2022-01-31 17:01:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-01-31 17:01:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:01:23,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,946 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:23,947 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash 158001525, now seen corresponding path program 27 times [2022-01-31 17:01:23,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512139128] [2022-01-31 17:01:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:24,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512139128] [2022-01-31 17:01:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512139128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:01:24,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109880491] [2022-01-31 17:01:24,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:01:24,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:01:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:24,306 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-31 17:01:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,786 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2022-01-31 17:01:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 79 [2022-01-31 17:01:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,787 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:01:24,787 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:01:24,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:01:24,788 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 60 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:01:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 17:01:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-01-31 17:01:24,800 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 79 [2022-01-31 17:01:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,800 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-01-31 17:01:24,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-31 17:01:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-01-31 17:01:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:01:24,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,801 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:24,801 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash 244875795, now seen corresponding path program 28 times [2022-01-31 17:01:24,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009773486] [2022-01-31 17:01:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:25,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009773486] [2022-01-31 17:01:25,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009773486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:01:25,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342666795] [2022-01-31 17:01:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:01:25,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:01:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:25,177 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-01-31 17:01:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,665 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2022-01-31 17:01:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 81 [2022-01-31 17:01:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,667 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:01:25,667 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:01:25,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:01:25,669 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 50 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:01:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 17:01:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2022-01-31 17:01:25,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 81 [2022-01-31 17:01:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2022-01-31 17:01:25,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-01-31 17:01:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2022-01-31 17:01:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:01:25,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,687 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:25,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:25,687 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2126670641, now seen corresponding path program 29 times [2022-01-31 17:01:25,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579648503] [2022-01-31 17:01:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,689 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:26,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579648503] [2022-01-31 17:01:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579648503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:01:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495537973] [2022-01-31 17:01:26,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:01:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:01:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:26,074 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,616 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-01-31 17:01:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:01:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:01:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,618 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:01:26,618 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:01:26,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:01:26,619 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 35 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:01:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-01-31 17:01:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 17:01:26,630 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 83 [2022-01-31 17:01:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:26,631 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 17:01:26,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 17:01:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:01:26,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:26,632 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:26,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:26,632 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1944681265, now seen corresponding path program 30 times [2022-01-31 17:01:26,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:26,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004887195] [2022-01-31 17:01:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:26,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:26,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:26,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:26,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:27,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004887195] [2022-01-31 17:01:27,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004887195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:01:27,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008057623] [2022-01-31 17:01:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:01:27,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:01:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:27,028 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:27,565 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-01-31 17:01:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:01:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 17:01:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:27,566 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:01:27,566 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:01:27,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:01:27,568 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:27,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 60 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:01:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-31 17:01:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-01-31 17:01:27,581 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 85 [2022-01-31 17:01:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:27,581 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-01-31 17:01:27,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-01-31 17:01:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:01:27,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:27,582 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:27,582 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1798656275, now seen corresponding path program 31 times [2022-01-31 17:01:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566341895] [2022-01-31 17:01:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:27,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:27,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:27,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:28,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566341895] [2022-01-31 17:01:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566341895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:28,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:01:28,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501030626] [2022-01-31 17:01:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:28,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:01:28,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:01:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:28,060 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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) [2022-01-31 17:01:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,583 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2022-01-31 17:01:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:01:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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 87 [2022-01-31 17:01:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,584 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:01:28,584 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:01:28,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:01:28,586 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 45 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:01:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 17:01:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2022-01-31 17:01:28,599 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 87 [2022-01-31 17:01:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2022-01-31 17:01:28,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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) [2022-01-31 17:01:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2022-01-31 17:01:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:01:28,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,601 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:28,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:28,601 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1092405643, now seen corresponding path program 32 times [2022-01-31 17:01:28,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91472754] [2022-01-31 17:01:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:29,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91472754] [2022-01-31 17:01:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [91472754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:29,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:29,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:01:29,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244787432] [2022-01-31 17:01:29,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:01:29,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:01:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:29,057 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,665 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-01-31 17:01:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:01:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 17:01:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,666 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:01:29,666 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:01:29,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:01:29,667 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:01:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-01-31 17:01:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2022-01-31 17:01:29,681 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 89 [2022-01-31 17:01:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,681 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2022-01-31 17:01:29,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2022-01-31 17:01:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:01:29,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,682 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:29,682 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash 559068329, now seen corresponding path program 33 times [2022-01-31 17:01:29,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426923973] [2022-01-31 17:01:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:30,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426923973] [2022-01-31 17:01:30,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1426923973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:01:30,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918702783] [2022-01-31 17:01:30,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:01:30,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:01:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:30,176 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:30,789 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-01-31 17:01:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:01:30,790 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:01:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:30,790 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:01:30,790 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:01:30,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:01:30,792 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:30,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 45 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:01:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-31 17:01:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.108910891089109) internal successors, (112), 101 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-01-31 17:01:30,818 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 91 [2022-01-31 17:01:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:30,819 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-01-31 17:01:30,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-01-31 17:01:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:01:30,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:30,820 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:30,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:30,820 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -876982201, now seen corresponding path program 34 times [2022-01-31 17:01:30,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362802176] [2022-01-31 17:01:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:30,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:30,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:30,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:30,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:31,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362802176] [2022-01-31 17:01:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362802176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:01:31,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460307404] [2022-01-31 17:01:31,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:01:31,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:01:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:31,296 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,898 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2022-01-31 17:01:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:01:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 17:01:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,899 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:01:31,899 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:01:31,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:01:31,900 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 40 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:01:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-01-31 17:01:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-01-31 17:01:31,912 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 93 [2022-01-31 17:01:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,913 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-01-31 17:01:31,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-01-31 17:01:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:01:31,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,914 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:31,914 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2057927781, now seen corresponding path program 35 times [2022-01-31 17:01:31,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645633857] [2022-01-31 17:01:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:32,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:32,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645633857] [2022-01-31 17:01:32,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645633857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:32,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:32,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:01:32,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085173226] [2022-01-31 17:01:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:32,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:01:32,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:01:32,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:32,449 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:33,114 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2022-01-31 17:01:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:01:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:01:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:33,115 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:01:33,115 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:01:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:01:33,117 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:33,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:01:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 17:01:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-01-31 17:01:33,133 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 95 [2022-01-31 17:01:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-01-31 17:01:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-01-31 17:01:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:01:33,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:33,134 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:33,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:33,134 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 712907011, now seen corresponding path program 36 times [2022-01-31 17:01:33,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:33,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392908695] [2022-01-31 17:01:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:33,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:33,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:33,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:33,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:33,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:33,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392908695] [2022-01-31 17:01:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [392908695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:33,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:01:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337182531] [2022-01-31 17:01:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:33,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:01:33,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:01:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:33,666 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,367 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2022-01-31 17:01:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:01:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 17:01:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,368 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:01:34,368 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:01:34,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:01:34,369 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 45 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:01:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-01-31 17:01:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.102803738317757) internal successors, (118), 107 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-01-31 17:01:34,384 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 97 [2022-01-31 17:01:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,384 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-01-31 17:01:34,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-01-31 17:01:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:01:34,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,385 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:34,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:01:34,385 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 933103137, now seen corresponding path program 37 times [2022-01-31 17:01:34,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589582844] [2022-01-31 17:01:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:34,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589582844] [2022-01-31 17:01:34,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [589582844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:01:34,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525487249] [2022-01-31 17:01:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:01:34,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:01:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:34,977 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:35,676 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2022-01-31 17:01:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:01:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:01:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:35,677 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:01:35,677 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 17:01:35,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:01:35,678 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:35,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 50 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 17:01:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 17:01:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-01-31 17:01:35,691 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 99 [2022-01-31 17:01:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:35,691 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-01-31 17:01:35,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-01-31 17:01:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:01:35,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:35,692 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:35,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:01:35,692 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2088182719, now seen corresponding path program 38 times [2022-01-31 17:01:35,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954253198] [2022-01-31 17:01:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:35,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:35,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:35,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:35,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:36,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:36,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954253198] [2022-01-31 17:01:36,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [954253198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:36,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:36,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:01:36,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041980671] [2022-01-31 17:01:36,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:36,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:01:36,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:01:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:36,321 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:37,068 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2022-01-31 17:01:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:01:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 17:01:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:37,069 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:01:37,070 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:01:37,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:01:37,071 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:37,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 55 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:01:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-01-31 17:01:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 111 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2022-01-31 17:01:37,088 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 101 [2022-01-31 17:01:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:37,089 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2022-01-31 17:01:37,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2022-01-31 17:01:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:01:37,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:37,090 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:37,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:01:37,090 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash -276868643, now seen corresponding path program 39 times [2022-01-31 17:01:37,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863224847] [2022-01-31 17:01:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:37,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:37,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:37,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:37,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:37,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863224847] [2022-01-31 17:01:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863224847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:37,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:01:37,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568430579] [2022-01-31 17:01:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:37,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:01:37,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:01:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:37,711 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:38,478 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2022-01-31 17:01:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:01:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:01:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:38,479 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:01:38,479 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:01:38,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:01:38,480 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:38,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 60 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:01:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-01-31 17:01:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2022-01-31 17:01:38,499 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 103 [2022-01-31 17:01:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:38,500 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2022-01-31 17:01:38,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2022-01-31 17:01:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:01:38,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:38,501 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:38,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:01:38,502 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1053527941, now seen corresponding path program 40 times [2022-01-31 17:01:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:38,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321096654] [2022-01-31 17:01:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:38,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:38,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:38,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:38,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:39,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:39,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321096654] [2022-01-31 17:01:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [321096654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:39,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:39,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:01:39,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646453586] [2022-01-31 17:01:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:01:39,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:01:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:39,182 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:39,979 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2022-01-31 17:01:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:01:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 17:01:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:39,980 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:01:39,980 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:01:39,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:01:39,981 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:39,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:01:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 17:01:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 17:01:40,000 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 105 [2022-01-31 17:01:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:40,001 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 17:01:40,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 17:01:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:01:40,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:40,002 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:40,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:01:40,002 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash -98803815, now seen corresponding path program 41 times [2022-01-31 17:01:40,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599671935] [2022-01-31 17:01:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:40,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:40,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:40,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:40,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:40,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:40,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599671935] [2022-01-31 17:01:40,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599671935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:40,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:40,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:01:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425506055] [2022-01-31 17:01:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:01:40,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:01:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:01:40,737 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,574 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2022-01-31 17:01:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:01:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:01:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,575 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:01:41,575 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:01:41,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:01:41,575 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:01:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-01-31 17:01:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2022-01-31 17:01:41,595 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2022-01-31 17:01:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:41,595 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2022-01-31 17:01:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2022-01-31 17:01:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:01:41,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:41,596 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:41,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:01:41,596 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1731920073, now seen corresponding path program 42 times [2022-01-31 17:01:41,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:41,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458830482] [2022-01-31 17:01:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:41,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:41,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:41,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:41,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:42,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458830482] [2022-01-31 17:01:42,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458830482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:01:42,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511334156] [2022-01-31 17:01:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:01:42,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:01:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:42,298 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:43,168 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2022-01-31 17:01:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:01:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 17:01:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:43,169 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:01:43,169 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:01:43,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:01:43,170 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:43,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 55 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:01:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-01-31 17:01:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-01-31 17:01:43,187 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 109 [2022-01-31 17:01:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:43,187 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-01-31 17:01:43,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-01-31 17:01:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:01:43,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:43,188 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:43,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:01:43,188 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash 801386325, now seen corresponding path program 43 times [2022-01-31 17:01:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281844414] [2022-01-31 17:01:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:43,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:43,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:43,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:43,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:43,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281844414] [2022-01-31 17:01:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281844414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:43,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:43,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:01:43,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670765584] [2022-01-31 17:01:43,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:43,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:01:43,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:01:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:01:43,884 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:44,845 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-01-31 17:01:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:01:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:01:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:44,846 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:01:44,847 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:01:44,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:01:44,848 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:44,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 50 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:01:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-01-31 17:01:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 121 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-01-31 17:01:44,869 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 111 [2022-01-31 17:01:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:44,869 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-01-31 17:01:44,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-01-31 17:01:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:01:44,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:44,870 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:44,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:01:44,871 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 62377971, now seen corresponding path program 44 times [2022-01-31 17:01:44,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693027839] [2022-01-31 17:01:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:44,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:44,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:44,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:44,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:45,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693027839] [2022-01-31 17:01:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693027839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:45,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:01:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452045062] [2022-01-31 17:01:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:01:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:01:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:45,596 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,537 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2022-01-31 17:01:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:01:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 17:01:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,537 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:01:46,538 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:01:46,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:01:46,538 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 65 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:01:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 17:01:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-01-31 17:01:46,557 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 113 [2022-01-31 17:01:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,557 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-01-31 17:01:46,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-01-31 17:01:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:01:46,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,558 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:46,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:01:46,559 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1455046383, now seen corresponding path program 45 times [2022-01-31 17:01:46,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678926605] [2022-01-31 17:01:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:47,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678926605] [2022-01-31 17:01:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [678926605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:47,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:47,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:01:47,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351767989] [2022-01-31 17:01:47,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:47,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:01:47,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:01:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:01:47,311 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:48,341 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2022-01-31 17:01:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:01:48,341 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:01:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:48,342 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:01:48,342 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:01:48,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:01:48,344 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:48,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 70 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:01:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-31 17:01:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2022-01-31 17:01:48,366 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 115 [2022-01-31 17:01:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:48,367 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2022-01-31 17:01:48,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2022-01-31 17:01:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:01:48,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:48,368 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:48,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:01:48,368 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 589030063, now seen corresponding path program 46 times [2022-01-31 17:01:48,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:48,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826676387] [2022-01-31 17:01:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:48,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:48,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:48,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:48,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:49,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826676387] [2022-01-31 17:01:49,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826676387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:49,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:49,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:01:49,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438303097] [2022-01-31 17:01:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:49,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:01:49,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:01:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:01:49,172 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:50,190 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-01-31 17:01:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:01:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 17:01:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:50,192 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:01:50,192 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:01:50,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:01:50,193 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:01:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-01-31 17:01:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-01-31 17:01:50,217 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 117 [2022-01-31 17:01:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:50,217 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-01-31 17:01:50,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-01-31 17:01:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:01:50,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:50,218 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:50,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:01:50,219 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2146440397, now seen corresponding path program 47 times [2022-01-31 17:01:50,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984439725] [2022-01-31 17:01:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:50,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:50,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:50,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:50,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:51,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984439725] [2022-01-31 17:01:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984439725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:51,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:51,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:01:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635995923] [2022-01-31 17:01:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:01:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:51,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:01:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:01:51,068 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:52,153 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2022-01-31 17:01:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:01:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:01:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:52,157 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:01:52,157 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:01:52,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:01:52,161 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:52,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 65 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:01:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-01-31 17:01:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2022-01-31 17:01:52,180 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 119 [2022-01-31 17:01:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:52,180 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2022-01-31 17:01:52,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2022-01-31 17:01:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:01:52,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:52,181 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:52,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:01:52,181 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -125814933, now seen corresponding path program 48 times [2022-01-31 17:01:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:52,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513241810] [2022-01-31 17:01:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:52,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:52,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:52,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:52,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:53,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:53,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513241810] [2022-01-31 17:01:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513241810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:53,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:53,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:01:53,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993916711] [2022-01-31 17:01:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:01:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:01:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:53,022 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:54,120 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2022-01-31 17:01:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:01:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 17:01:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:54,122 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:01:54,122 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:01:54,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:01:54,124 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 120 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:54,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 45 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:01:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-01-31 17:01:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.083969465648855) internal successors, (142), 131 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2022-01-31 17:01:54,151 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 121 [2022-01-31 17:01:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:54,151 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2022-01-31 17:01:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2022-01-31 17:01:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:01:54,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:54,152 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:54,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:01:54,152 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1919800695, now seen corresponding path program 49 times [2022-01-31 17:01:54,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:54,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479126222] [2022-01-31 17:01:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:54,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:54,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:54,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:54,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:55,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:55,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:55,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479126222] [2022-01-31 17:01:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [479126222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:55,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:55,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:01:55,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143911217] [2022-01-31 17:01:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:55,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:01:55,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:01:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:01:55,074 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:56,184 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2022-01-31 17:01:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:01:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:01:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:56,185 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:01:56,185 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 17:01:56,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:01:56,186 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:56,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 17:01:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 17:01:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 133 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2022-01-31 17:01:56,213 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 123 [2022-01-31 17:01:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:56,213 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2022-01-31 17:01:56,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2022-01-31 17:01:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:01:56,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:56,214 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:01:56,214 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash 636735015, now seen corresponding path program 50 times [2022-01-31 17:01:56,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649619037] [2022-01-31 17:01:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:56,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:56,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:56,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:56,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:57,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:57,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:57,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649619037] [2022-01-31 17:01:57,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649619037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:57,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:57,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:01:57,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222014381] [2022-01-31 17:01:57,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:57,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:01:57,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:01:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:01:57,244 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:58,409 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2022-01-31 17:01:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:01:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 17:01:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:58,411 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:01:58,411 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:01:58,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:01:58,412 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:58,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 65 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:01:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-01-31 17:01:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2022-01-31 17:01:58,430 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 125 [2022-01-31 17:01:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:58,430 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2022-01-31 17:01:58,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2022-01-31 17:01:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:01:58,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:58,431 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:58,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:01:58,431 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 746259013, now seen corresponding path program 51 times [2022-01-31 17:01:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526387181] [2022-01-31 17:01:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:58,435 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:58,435 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:58,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:58,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:59,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526387181] [2022-01-31 17:01:59,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526387181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:59,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:59,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:01:59,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959501747] [2022-01-31 17:01:59,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:59,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:01:59,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:01:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:01:59,392 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:00,578 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-01-31 17:02:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:02:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:02:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:00,579 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:02:00,579 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:02:00,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:02:00,581 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:00,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:02:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-01-31 17:02:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 17:02:00,603 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 127 [2022-01-31 17:02:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:00,603 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 17:02:00,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 17:02:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:02:00,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:00,604 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:02:00,604 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1375361309, now seen corresponding path program 52 times [2022-01-31 17:02:00,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:00,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726547069] [2022-01-31 17:02:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:00,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:00,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:00,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:00,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:01,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726547069] [2022-01-31 17:02:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726547069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:01,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:02:01,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043992442] [2022-01-31 17:02:01,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:02:01,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:02:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:02:01,648 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:02,912 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2022-01-31 17:02:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:02:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 17:02:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:02,913 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:02:02,913 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:02:02,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:02:02,914 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:02,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 45 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:02:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-01-31 17:02:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-01-31 17:02:02,944 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 129 [2022-01-31 17:02:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:02,944 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-01-31 17:02:02,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-01-31 17:02:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:02:02,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:02,945 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:02,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:02:02,945 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash -143025151, now seen corresponding path program 53 times [2022-01-31 17:02:02,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791416801] [2022-01-31 17:02:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:02,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:02,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:02,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:02,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:04,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791416801] [2022-01-31 17:02:04,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791416801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:04,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:04,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:02:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116439457] [2022-01-31 17:02:04,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:04,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:02:04,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:02:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:02:04,021 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:05,269 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2022-01-31 17:02:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:02:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:02:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:05,270 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:02:05,271 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:02:05,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:02:05,272 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:05,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 45 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:02:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-01-31 17:02:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 141 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2022-01-31 17:02:05,294 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 131 [2022-01-31 17:02:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2022-01-31 17:02:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2022-01-31 17:02:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:02:05,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:05,295 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:05,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:02:05,295 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1278951009, now seen corresponding path program 54 times [2022-01-31 17:02:05,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:05,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605890394] [2022-01-31 17:02:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:05,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:05,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:05,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:05,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:06,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605890394] [2022-01-31 17:02:06,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605890394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:06,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:06,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:02:06,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281816074] [2022-01-31 17:02:06,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:06,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:02:06,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:02:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:02:06,371 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:07,673 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2022-01-31 17:02:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:02:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 17:02:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:07,674 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:02:07,674 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:02:07,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:02:07,676 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:07,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 55 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:02:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-01-31 17:02:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.0769230769230769) internal successors, (154), 143 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 159 transitions. [2022-01-31 17:02:07,706 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 159 transitions. Word has length 133 [2022-01-31 17:02:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:07,706 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 159 transitions. [2022-01-31 17:02:07,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 159 transitions. [2022-01-31 17:02:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:02:07,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:07,708 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:07,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:02:07,708 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1982007363, now seen corresponding path program 55 times [2022-01-31 17:02:07,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676721504] [2022-01-31 17:02:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:07,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:07,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:07,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:07,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:08,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:08,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676721504] [2022-01-31 17:02:08,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676721504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:08,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:08,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:02:08,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987006935] [2022-01-31 17:02:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:08,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:02:08,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:02:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:02:08,791 INFO L87 Difference]: Start difference. First operand 149 states and 159 transitions. Second operand has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:10,100 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2022-01-31 17:02:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:02:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:02:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:10,101 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:02:10,101 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:02:10,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:02:10,103 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:10,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 40 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:02:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-01-31 17:02:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.0758620689655172) internal successors, (156), 145 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2022-01-31 17:02:10,134 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 135 [2022-01-31 17:02:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:10,134 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2022-01-31 17:02:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2022-01-31 17:02:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:02:10,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:10,135 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:02:10,135 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash 985669211, now seen corresponding path program 56 times [2022-01-31 17:02:10,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99405230] [2022-01-31 17:02:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:10,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:10,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:10,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:10,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:11,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:11,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99405230] [2022-01-31 17:02:11,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [99405230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:11,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:11,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:02:11,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458706032] [2022-01-31 17:02:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:02:11,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:02:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:02:11,277 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:12,665 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2022-01-31 17:02:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:02:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 17:02:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:12,666 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:02:12,666 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:02:12,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:02:12,667 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:12,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:02:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-01-31 17:02:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2022-01-31 17:02:12,689 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 137 [2022-01-31 17:02:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:12,690 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2022-01-31 17:02:12,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2022-01-31 17:02:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:02:12,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:12,690 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:12,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:02:12,691 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1064572281, now seen corresponding path program 57 times [2022-01-31 17:02:12,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271822858] [2022-01-31 17:02:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:12,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:12,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:12,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:12,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:13,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:13,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271822858] [2022-01-31 17:02:13,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271822858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:13,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:13,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:02:13,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681873009] [2022-01-31 17:02:13,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:13,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:02:13,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:02:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:02:13,852 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:15,255 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2022-01-31 17:02:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:02:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:02:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:15,256 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:02:15,257 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:02:15,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:02:15,258 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:15,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 50 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:02:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-01-31 17:02:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2022-01-31 17:02:15,282 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 139 [2022-01-31 17:02:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:15,282 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2022-01-31 17:02:15,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2022-01-31 17:02:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:02:15,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:15,282 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:02:15,283 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -418988777, now seen corresponding path program 58 times [2022-01-31 17:02:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719227434] [2022-01-31 17:02:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:15,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:15,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:15,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:15,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:16,494 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719227434] [2022-01-31 17:02:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719227434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:16,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:02:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426448532] [2022-01-31 17:02:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:16,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:02:16,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:02:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:02:16,495 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:17,970 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-01-31 17:02:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:02:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 17:02:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:17,972 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:02:17,972 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:02:17,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:02:17,973 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:17,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 55 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:02:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 17:02:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 167 transitions. [2022-01-31 17:02:17,996 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 167 transitions. Word has length 141 [2022-01-31 17:02:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:17,997 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 167 transitions. [2022-01-31 17:02:17,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 167 transitions. [2022-01-31 17:02:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:02:17,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:17,997 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:17,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:02:17,998 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -192023243, now seen corresponding path program 59 times [2022-01-31 17:02:17,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:17,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17221403] [2022-01-31 17:02:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:17,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:17,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:18,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:18,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:19,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:19,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17221403] [2022-01-31 17:02:19,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [17221403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:19,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:19,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:02:19,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705555292] [2022-01-31 17:02:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:19,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:02:19,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:02:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:02:19,235 INFO L87 Difference]: Start difference. First operand 157 states and 167 transitions. Second operand has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:20,747 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2022-01-31 17:02:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:02:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:02:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:20,748 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:02:20,748 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:02:20,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:02:20,749 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:20,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 50 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:02:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-01-31 17:02:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2022-01-31 17:02:20,784 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 143 [2022-01-31 17:02:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:20,784 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2022-01-31 17:02:20,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2022-01-31 17:02:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:02:20,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:20,785 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:20,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:02:20,786 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1121477165, now seen corresponding path program 60 times [2022-01-31 17:02:20,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754855893] [2022-01-31 17:02:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:20,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:20,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:20,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:20,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:22,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754855893] [2022-01-31 17:02:22,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754855893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:22,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:22,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:02:22,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13742928] [2022-01-31 17:02:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:22,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:02:22,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:02:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:02:22,069 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:23,600 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-01-31 17:02:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:02:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 17:02:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:23,601 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:02:23,601 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:02:23,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:02:23,602 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:23,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 40 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:02:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-01-31 17:02:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.070967741935484) internal successors, (166), 155 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2022-01-31 17:02:23,628 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 145 [2022-01-31 17:02:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:23,628 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2022-01-31 17:02:23,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2022-01-31 17:02:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:02:23,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:23,628 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:23,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:02:23,629 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash -973498639, now seen corresponding path program 61 times [2022-01-31 17:02:23,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:23,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238050797] [2022-01-31 17:02:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:23,630 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:23,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:23,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:23,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:24,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:24,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238050797] [2022-01-31 17:02:24,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238050797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:24,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:24,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:02:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179681396] [2022-01-31 17:02:24,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:02:24,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:02:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:02:24,937 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:26,519 INFO L93 Difference]: Finished difference Result 198 states and 218 transitions. [2022-01-31 17:02:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:02:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:02:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:26,520 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:02:26,520 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 17:02:26,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:02:26,522 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:26,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 17:02:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-01-31 17:02:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2022-01-31 17:02:26,560 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 147 [2022-01-31 17:02:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2022-01-31 17:02:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2022-01-31 17:02:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:02:26,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:26,561 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:02:26,561 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash -500055921, now seen corresponding path program 62 times [2022-01-31 17:02:26,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:26,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598266862] [2022-01-31 17:02:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:26,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:26,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:26,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:26,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:27,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:27,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598266862] [2022-01-31 17:02:27,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598266862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:27,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:27,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:02:27,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564082885] [2022-01-31 17:02:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:27,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:02:27,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:27,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:02:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:02:27,933 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:29,569 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2022-01-31 17:02:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:02:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 17:02:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:29,570 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:02:29,570 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:02:29,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:02:29,571 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:29,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 55 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:02:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-01-31 17:02:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 17:02:29,596 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 149 [2022-01-31 17:02:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 17:02:29,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 17:02:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:02:29,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:29,597 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:29,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:02:29,598 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -788137299, now seen corresponding path program 63 times [2022-01-31 17:02:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427425459] [2022-01-31 17:02:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:29,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:29,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:29,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:29,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:30,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:30,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427425459] [2022-01-31 17:02:30,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427425459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:30,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:30,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:02:30,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651079283] [2022-01-31 17:02:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:30,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:02:30,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:02:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:02:30,973 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:32,676 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2022-01-31 17:02:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:02:32,676 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:02:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:32,677 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:02:32,677 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:02:32,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:02:32,678 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:32,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:02:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-01-31 17:02:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 161 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 177 transitions. [2022-01-31 17:02:32,704 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 177 transitions. Word has length 151 [2022-01-31 17:02:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:32,705 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 177 transitions. [2022-01-31 17:02:32,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 177 transitions. [2022-01-31 17:02:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:02:32,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:32,705 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:32,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:02:32,706 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1538532683, now seen corresponding path program 64 times [2022-01-31 17:02:32,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:32,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382291974] [2022-01-31 17:02:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:32,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:32,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:32,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:32,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:34,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:34,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:34,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382291974] [2022-01-31 17:02:34,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382291974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:34,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:34,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:02:34,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332378605] [2022-01-31 17:02:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:34,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:02:34,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:02:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:02:34,110 INFO L87 Difference]: Start difference. First operand 167 states and 177 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:35,841 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2022-01-31 17:02:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:02:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 17:02:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:35,842 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:02:35,842 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:02:35,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:02:35,844 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 152 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:35,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 60 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:02:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-01-31 17:02:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.0674846625766872) internal successors, (174), 163 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2022-01-31 17:02:35,873 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 153 [2022-01-31 17:02:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:35,873 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2022-01-31 17:02:35,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2022-01-31 17:02:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:02:35,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:35,874 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:35,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:02:35,875 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:35,875 INFO L85 PathProgramCache]: Analyzing trace with hash -209575831, now seen corresponding path program 65 times [2022-01-31 17:02:35,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:35,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102055274] [2022-01-31 17:02:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:35,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:35,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:35,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:35,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:37,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:37,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102055274] [2022-01-31 17:02:37,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102055274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:37,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:37,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:02:37,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364185469] [2022-01-31 17:02:37,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:37,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:02:37,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:02:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:02:37,332 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:39,098 INFO L93 Difference]: Finished difference Result 206 states and 226 transitions. [2022-01-31 17:02:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:02:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:02:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:39,098 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:02:39,098 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 17:02:39,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:02:39,100 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:39,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 45 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 17:02:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-01-31 17:02:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.0666666666666667) internal successors, (176), 165 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2022-01-31 17:02:39,142 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 155 [2022-01-31 17:02:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2022-01-31 17:02:39,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2022-01-31 17:02:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:02:39,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:39,143 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:39,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:02:39,144 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -809645049, now seen corresponding path program 66 times [2022-01-31 17:02:39,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634279359] [2022-01-31 17:02:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:39,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:39,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:39,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:40,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:40,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634279359] [2022-01-31 17:02:40,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634279359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:40,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:40,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:02:40,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011773948] [2022-01-31 17:02:40,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:40,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:02:40,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:02:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:02:40,669 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:42,507 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2022-01-31 17:02:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:02:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 17:02:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:42,508 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:02:42,508 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:02:42,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:02:42,509 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:42,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 55 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:02:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-01-31 17:02:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 167 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2022-01-31 17:02:42,553 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 157 [2022-01-31 17:02:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2022-01-31 17:02:42,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2022-01-31 17:02:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:02:42,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:42,555 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:42,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:02:42,555 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1950545883, now seen corresponding path program 67 times [2022-01-31 17:02:42,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:42,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559695694] [2022-01-31 17:02:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:42,557 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:42,557 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:42,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:42,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:44,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559695694] [2022-01-31 17:02:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559695694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:44,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:44,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:02:44,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848393106] [2022-01-31 17:02:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:44,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:02:44,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:02:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:02:44,127 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:46,027 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2022-01-31 17:02:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:02:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:02:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:46,028 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:02:46,028 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:02:46,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:02:46,029 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:46,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 60 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:02:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 17:02:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.0650887573964498) internal successors, (180), 169 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 185 transitions. [2022-01-31 17:02:46,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 185 transitions. Word has length 159 [2022-01-31 17:02:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:46,076 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 185 transitions. [2022-01-31 17:02:46,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 185 transitions. [2022-01-31 17:02:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:02:46,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:46,077 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:02:46,077 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1155380419, now seen corresponding path program 68 times [2022-01-31 17:02:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:46,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182346121] [2022-01-31 17:02:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:46,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:46,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:46,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:46,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:47,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:47,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182346121] [2022-01-31 17:02:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182346121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:47,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:02:47,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749795525] [2022-01-31 17:02:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:02:47,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:02:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:02:47,718 INFO L87 Difference]: Start difference. First operand 175 states and 185 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:49,670 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2022-01-31 17:02:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:02:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 17:02:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:49,671 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:02:49,671 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:02:49,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:02:49,672 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:49,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:02:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 17:02:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 171 states have (on average 1.064327485380117) internal successors, (182), 171 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 187 transitions. [2022-01-31 17:02:49,709 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 187 transitions. Word has length 161 [2022-01-31 17:02:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:49,709 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 187 transitions. [2022-01-31 17:02:49,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 187 transitions. [2022-01-31 17:02:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:02:49,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:49,710 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:49,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:02:49,710 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash 948285921, now seen corresponding path program 69 times [2022-01-31 17:02:49,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130729691] [2022-01-31 17:02:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:49,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:49,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:49,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:49,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:51,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:51,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130729691] [2022-01-31 17:02:51,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130729691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:51,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:51,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:02:51,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207939991] [2022-01-31 17:02:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:02:51,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:02:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:02:51,320 INFO L87 Difference]: Start difference. First operand 177 states and 187 transitions. Second operand has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:53,306 INFO L93 Difference]: Finished difference Result 214 states and 234 transitions. [2022-01-31 17:02:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:02:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:02:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:53,307 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:02:53,307 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 17:02:53,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:02:53,309 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:53,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 60 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 17:02:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-01-31 17:02:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.0635838150289016) internal successors, (184), 173 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 189 transitions. [2022-01-31 17:02:53,342 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 189 transitions. Word has length 163 [2022-01-31 17:02:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 189 transitions. [2022-01-31 17:02:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 189 transitions. [2022-01-31 17:02:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:02:53,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:53,343 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:53,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:02:53,343 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -501031041, now seen corresponding path program 70 times [2022-01-31 17:02:53,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:53,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915724683] [2022-01-31 17:02:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:53,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:53,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:53,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:53,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:54,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915724683] [2022-01-31 17:02:54,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915724683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:54,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:54,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:02:54,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339394629] [2022-01-31 17:02:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:02:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:02:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:02:54,993 INFO L87 Difference]: Start difference. First operand 179 states and 189 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:57,054 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2022-01-31 17:02:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:02:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 17:02:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:57,055 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:02:57,055 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 17:02:57,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:02:57,056 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:57,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 60 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 17:02:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 17:02:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.062857142857143) internal successors, (186), 175 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2022-01-31 17:02:57,088 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 165 [2022-01-31 17:02:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:57,088 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2022-01-31 17:02:57,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2022-01-31 17:02:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:02:57,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:57,089 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:02:57,089 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1725227619, now seen corresponding path program 71 times [2022-01-31 17:02:57,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005208728] [2022-01-31 17:02:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:57,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:57,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:57,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:57,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:58,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:58,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:58,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005208728] [2022-01-31 17:02:58,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005208728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:58,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:58,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:02:58,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944138416] [2022-01-31 17:02:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:58,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:02:58,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:02:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:02:58,839 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:00,954 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2022-01-31 17:03:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:03:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:03:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:00,955 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:03:00,955 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:03:00,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:03:00,956 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 166 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:00,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 70 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:03:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-01-31 17:03:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.0621468926553672) internal successors, (188), 177 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 193 transitions. [2022-01-31 17:03:00,999 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 193 transitions. Word has length 167 [2022-01-31 17:03:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 193 transitions. [2022-01-31 17:03:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 193 transitions. [2022-01-31 17:03:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:03:01,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:01,000 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:01,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:03:01,000 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1357099973, now seen corresponding path program 72 times [2022-01-31 17:03:01,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:01,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63351796] [2022-01-31 17:03:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:01,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:01,002 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:01,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:01,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:02,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:02,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63351796] [2022-01-31 17:03:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [63351796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:02,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:03:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194060354] [2022-01-31 17:03:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:03:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:03:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:03:02,742 INFO L87 Difference]: Start difference. First operand 183 states and 193 transitions. Second operand has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:04,956 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2022-01-31 17:03:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:03:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 17:03:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:04,957 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:03:04,957 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 17:03:04,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:03:04,958 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 168 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:04,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 75 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 17:03:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-01-31 17:03:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 179 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2022-01-31 17:03:05,010 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 169 [2022-01-31 17:03:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:05,011 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2022-01-31 17:03:05,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2022-01-31 17:03:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:03:05,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:05,012 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:05,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:03:05,012 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash 226249561, now seen corresponding path program 73 times [2022-01-31 17:03:05,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:05,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108217854] [2022-01-31 17:03:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:05,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:05,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:05,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:05,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:06,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:06,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108217854] [2022-01-31 17:03:06,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [108217854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:06,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:06,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:03:06,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214967795] [2022-01-31 17:03:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:06,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:03:06,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:03:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:03:06,858 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:09,070 INFO L93 Difference]: Finished difference Result 222 states and 242 transitions. [2022-01-31 17:03:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:03:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:03:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:09,071 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:03:09,071 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 17:03:09,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:03:09,072 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:09,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 65 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 17:03:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 17:03:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 17:03:09,122 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 171 [2022-01-31 17:03:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:09,122 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 17:03:09,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 17:03:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:03:09,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:09,123 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:03:09,124 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1406728951, now seen corresponding path program 74 times [2022-01-31 17:03:09,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:09,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16401283] [2022-01-31 17:03:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:09,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:09,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:09,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:09,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:10,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:10,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:10,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16401283] [2022-01-31 17:03:10,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16401283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:10,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:03:10,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782902096] [2022-01-31 17:03:10,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:10,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:03:10,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:03:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:03:10,954 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:13,220 INFO L93 Difference]: Finished difference Result 224 states and 244 transitions. [2022-01-31 17:03:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:03:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 17:03:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:13,221 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:03:13,221 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 17:03:13,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:03:13,222 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 65 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 17:03:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-01-31 17:03:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.0601092896174864) internal successors, (194), 183 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2022-01-31 17:03:13,260 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 173 [2022-01-31 17:03:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2022-01-31 17:03:13,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2022-01-31 17:03:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:03:13,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:13,261 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:13,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:03:13,261 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1976056597, now seen corresponding path program 75 times [2022-01-31 17:03:13,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:13,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029759366] [2022-01-31 17:03:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:13,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:13,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:13,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:13,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:15,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:15,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029759366] [2022-01-31 17:03:15,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029759366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:15,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:15,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:03:15,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248506343] [2022-01-31 17:03:15,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:03:15,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:03:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:03:15,139 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:17,449 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2022-01-31 17:03:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:03:17,449 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:03:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:17,450 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:03:17,450 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:03:17,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:03:17,451 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 174 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:17,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:03:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-01-31 17:03:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.0594594594594595) internal successors, (196), 185 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2022-01-31 17:03:17,486 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 175 [2022-01-31 17:03:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2022-01-31 17:03:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2022-01-31 17:03:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:03:17,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:17,487 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:03:17,487 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash -655889485, now seen corresponding path program 76 times [2022-01-31 17:03:17,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620269368] [2022-01-31 17:03:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:17,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:17,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:17,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:17,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:19,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:19,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620269368] [2022-01-31 17:03:19,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620269368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:19,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:19,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:03:19,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45650358] [2022-01-31 17:03:19,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:03:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:03:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:03:19,401 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:21,747 INFO L93 Difference]: Finished difference Result 228 states and 248 transitions. [2022-01-31 17:03:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:03:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 17:03:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:21,748 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:03:21,748 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 17:03:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:03:21,749 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 176 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:21,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 45 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 17:03:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-01-31 17:03:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.0588235294117647) internal successors, (198), 187 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2022-01-31 17:03:21,785 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 177 [2022-01-31 17:03:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:21,786 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2022-01-31 17:03:21,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2022-01-31 17:03:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:03:21,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:21,787 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:21,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:03:21,787 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -220336943, now seen corresponding path program 77 times [2022-01-31 17:03:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847653428] [2022-01-31 17:03:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:21,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:21,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:21,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:21,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:23,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847653428] [2022-01-31 17:03:23,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847653428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:23,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:23,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:03:23,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118528278] [2022-01-31 17:03:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:23,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:03:23,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:03:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:03:23,756 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:26,174 INFO L93 Difference]: Finished difference Result 230 states and 250 transitions. [2022-01-31 17:03:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:03:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:03:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:26,175 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:03:26,175 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 17:03:26,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:03:26,176 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:26,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 55 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 17:03:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-01-31 17:03:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.0582010582010581) internal successors, (200), 189 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 205 transitions. [2022-01-31 17:03:26,234 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 205 transitions. Word has length 179 [2022-01-31 17:03:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:26,234 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 205 transitions. [2022-01-31 17:03:26,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 205 transitions. [2022-01-31 17:03:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:03:26,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:26,235 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:03:26,235 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1733828207, now seen corresponding path program 78 times [2022-01-31 17:03:26,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520269602] [2022-01-31 17:03:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:26,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:26,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:26,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:26,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:28,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520269602] [2022-01-31 17:03:28,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520269602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:28,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:28,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:03:28,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672086896] [2022-01-31 17:03:28,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:28,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:03:28,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:03:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:03:28,257 INFO L87 Difference]: Start difference. First operand 195 states and 205 transitions. Second operand has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:30,757 INFO L93 Difference]: Finished difference Result 232 states and 252 transitions. [2022-01-31 17:03:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:03:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 17:03:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:30,759 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:03:30,759 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:03:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:03:30,760 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 180 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:30,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 50 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:03:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-01-31 17:03:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 191 states have (on average 1.057591623036649) internal successors, (202), 191 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 207 transitions. [2022-01-31 17:03:30,813 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 207 transitions. Word has length 181 [2022-01-31 17:03:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:30,813 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 207 transitions. [2022-01-31 17:03:30,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 207 transitions. [2022-01-31 17:03:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:03:30,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:30,814 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:30,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:03:30,814 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1509138291, now seen corresponding path program 79 times [2022-01-31 17:03:30,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692303128] [2022-01-31 17:03:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:30,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:30,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:30,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:30,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:32,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692303128] [2022-01-31 17:03:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1692303128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:32,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:32,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:03:32,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527417481] [2022-01-31 17:03:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:32,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:03:32,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:03:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:03:32,898 INFO L87 Difference]: Start difference. First operand 197 states and 207 transitions. Second operand has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:35,407 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2022-01-31 17:03:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:03:35,407 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:03:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:35,408 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:03:35,408 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 17:03:35,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:03:35,409 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:35,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 50 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 17:03:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-01-31 17:03:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.0569948186528497) internal successors, (204), 193 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2022-01-31 17:03:35,448 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 183 [2022-01-31 17:03:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:35,448 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2022-01-31 17:03:35,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2022-01-31 17:03:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:03:35,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:35,449 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:35,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:03:35,450 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:35,450 INFO L85 PathProgramCache]: Analyzing trace with hash 146314027, now seen corresponding path program 80 times [2022-01-31 17:03:35,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:35,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438486073] [2022-01-31 17:03:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:35,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:35,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:35,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:35,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:37,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:37,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438486073] [2022-01-31 17:03:37,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [438486073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:37,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:37,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:03:37,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342544324] [2022-01-31 17:03:37,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:37,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:03:37,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:03:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:03:37,595 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:40,207 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-01-31 17:03:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:03:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 17:03:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:40,208 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:03:40,208 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:03:40,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:03:40,210 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 184 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:40,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 85 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:03:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-01-31 17:03:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 195 states have (on average 1.0564102564102564) internal successors, (206), 195 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2022-01-31 17:03:40,259 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 185 [2022-01-31 17:03:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:40,259 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2022-01-31 17:03:40,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2022-01-31 17:03:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:03:40,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:40,260 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:40,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:03:40,260 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1898092105, now seen corresponding path program 81 times [2022-01-31 17:03:40,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:40,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984273988] [2022-01-31 17:03:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:40,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:40,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:40,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:40,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:42,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:42,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:42,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984273988] [2022-01-31 17:03:42,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984273988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:42,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:03:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680636991] [2022-01-31 17:03:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:03:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:03:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:03:42,415 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:45,084 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2022-01-31 17:03:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:03:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:03:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:45,086 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:03:45,086 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 17:03:45,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:03:45,087 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:45,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 70 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 17:03:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-01-31 17:03:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 213 transitions. [2022-01-31 17:03:45,131 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 213 transitions. Word has length 187 [2022-01-31 17:03:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:45,131 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 213 transitions. [2022-01-31 17:03:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 213 transitions. [2022-01-31 17:03:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:03:45,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:45,132 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:45,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:03:45,133 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1729645031, now seen corresponding path program 82 times [2022-01-31 17:03:45,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:45,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959090958] [2022-01-31 17:03:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:45,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:45,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:45,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:45,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:47,358 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:47,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959090958] [2022-01-31 17:03:47,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959090958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:47,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:47,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:03:47,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870331966] [2022-01-31 17:03:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:47,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:03:47,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:03:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:03:47,362 INFO L87 Difference]: Start difference. First operand 203 states and 213 transitions. Second operand has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:50,091 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2022-01-31 17:03:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:03:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 17:03:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:50,096 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:03:50,096 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 17:03:50,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:03:50,098 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 188 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:50,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 60 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 17:03:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 17:03:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0552763819095476) internal successors, (210), 199 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2022-01-31 17:03:50,174 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 189 [2022-01-31 17:03:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:50,174 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2022-01-31 17:03:50,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2022-01-31 17:03:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:03:50,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:50,176 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:50,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:03:50,176 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1234203131, now seen corresponding path program 83 times [2022-01-31 17:03:50,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15066303] [2022-01-31 17:03:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:50,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:50,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:50,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:50,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:52,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:52,445 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:52,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15066303] [2022-01-31 17:03:52,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [15066303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:52,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:52,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:03:52,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731203229] [2022-01-31 17:03:52,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:52,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:03:52,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:52,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:03:52,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:03:52,447 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:55,204 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2022-01-31 17:03:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:03:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:03:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:55,205 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:03:55,205 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:03:55,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:03:55,206 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:55,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:03:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-01-31 17:03:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.054726368159204) internal successors, (212), 201 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 217 transitions. [2022-01-31 17:03:55,249 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 217 transitions. Word has length 191 [2022-01-31 17:03:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 217 transitions. [2022-01-31 17:03:55,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 217 transitions. [2022-01-31 17:03:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:03:55,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:55,251 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:55,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:03:55,251 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1928969565, now seen corresponding path program 84 times [2022-01-31 17:03:55,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:55,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291465215] [2022-01-31 17:03:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:55,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:55,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:55,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:55,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:57,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:57,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291465215] [2022-01-31 17:03:57,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [291465215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:57,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:57,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:03:57,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968905006] [2022-01-31 17:03:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:57,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:03:57,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:03:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:03:57,560 INFO L87 Difference]: Start difference. First operand 207 states and 217 transitions. Second operand has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:00,367 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2022-01-31 17:04:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:04:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 17:04:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:00,368 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:04:00,368 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 17:04:00,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:04:00,370 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 192 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:00,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 17:04:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-01-31 17:04:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 17:04:00,448 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 193 [2022-01-31 17:04:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:00,448 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 17:04:00,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 17:04:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:04:00,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:00,449 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:00,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:04:00,449 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash 415385537, now seen corresponding path program 85 times [2022-01-31 17:04:00,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259741641] [2022-01-31 17:04:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:00,451 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:00,451 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:00,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:00,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:02,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259741641] [2022-01-31 17:04:02,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [259741641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:02,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:02,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:04:02,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547360161] [2022-01-31 17:04:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:02,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:04:02,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:04:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:04:02,826 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:05,759 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2022-01-31 17:04:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:04:05,759 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:04:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:05,760 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:04:05,760 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 17:04:05,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:04:05,762 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:05,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 80 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 17:04:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 17:04:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.053658536585366) internal successors, (216), 205 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 221 transitions. [2022-01-31 17:04:05,816 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 221 transitions. Word has length 195 [2022-01-31 17:04:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 221 transitions. [2022-01-31 17:04:05,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 221 transitions. [2022-01-31 17:04:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:04:05,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:05,817 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:05,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:04:05,822 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1517191841, now seen corresponding path program 86 times [2022-01-31 17:04:05,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690953444] [2022-01-31 17:04:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:05,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:05,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:05,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:05,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:08,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:08,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690953444] [2022-01-31 17:04:08,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690953444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:08,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:08,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:04:08,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480420204] [2022-01-31 17:04:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:04:08,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:04:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:04:08,250 INFO L87 Difference]: Start difference. First operand 211 states and 221 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:11,205 INFO L93 Difference]: Finished difference Result 248 states and 268 transitions. [2022-01-31 17:04:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:04:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 17:04:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:11,206 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:04:11,206 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:04:11,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:04:11,207 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 196 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:11,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 55 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:04:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-31 17:04:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 207 states have (on average 1.0531400966183575) internal successors, (218), 207 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 223 transitions. [2022-01-31 17:04:11,253 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 223 transitions. Word has length 197 [2022-01-31 17:04:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 223 transitions. [2022-01-31 17:04:11,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 223 transitions. [2022-01-31 17:04:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:04:11,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:11,255 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:04:11,255 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash 996787069, now seen corresponding path program 87 times [2022-01-31 17:04:11,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:11,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054373521] [2022-01-31 17:04:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:11,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:11,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:11,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:11,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:13,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:13,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:13,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054373521] [2022-01-31 17:04:13,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054373521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:13,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:13,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:04:13,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532041486] [2022-01-31 17:04:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:13,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:04:13,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:04:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:04:13,747 INFO L87 Difference]: Start difference. First operand 213 states and 223 transitions. Second operand has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:16,764 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2022-01-31 17:04:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:04:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:04:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:16,765 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:04:16,765 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:04:16,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:04:16,766 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 198 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:16,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 60 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:04:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-01-31 17:04:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.0526315789473684) internal successors, (220), 209 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 225 transitions. [2022-01-31 17:04:16,825 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 225 transitions. Word has length 199 [2022-01-31 17:04:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:16,825 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 225 transitions. [2022-01-31 17:04:16,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 225 transitions. [2022-01-31 17:04:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:04:16,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:16,826 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:16,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:04:16,826 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1136068069, now seen corresponding path program 88 times [2022-01-31 17:04:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309209788] [2022-01-31 17:04:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:16,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:16,827 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:16,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:16,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:19,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309209788] [2022-01-31 17:04:19,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [309209788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:19,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:19,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:04:19,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40341709] [2022-01-31 17:04:19,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:19,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:04:19,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:04:19,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:04:19,355 INFO L87 Difference]: Start difference. First operand 215 states and 225 transitions. Second operand has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:22,457 INFO L93 Difference]: Finished difference Result 252 states and 272 transitions. [2022-01-31 17:04:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:04:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 17:04:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:22,458 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:04:22,458 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 17:04:22,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:04:22,459 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:22,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 70 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 17:04:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-01-31 17:04:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 211 states have (on average 1.052132701421801) internal successors, (222), 211 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2022-01-31 17:04:22,528 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 201 [2022-01-31 17:04:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:22,529 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2022-01-31 17:04:22,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2022-01-31 17:04:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:04:22,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:22,530 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:22,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:04:22,530 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2110455495, now seen corresponding path program 89 times [2022-01-31 17:04:22,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561991400] [2022-01-31 17:04:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:22,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:22,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:22,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:22,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:25,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561991400] [2022-01-31 17:04:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561991400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:25,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:04:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877348282] [2022-01-31 17:04:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:04:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:04:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:04:25,122 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:28,279 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2022-01-31 17:04:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:04:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:04:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:28,280 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:04:28,280 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 17:04:28,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:04:28,281 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:28,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 75 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 17:04:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-01-31 17:04:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.051643192488263) internal successors, (224), 213 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 229 transitions. [2022-01-31 17:04:28,330 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 229 transitions. Word has length 203 [2022-01-31 17:04:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:28,330 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 229 transitions. [2022-01-31 17:04:28,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 229 transitions. [2022-01-31 17:04:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:04:28,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:28,331 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:04:28,331 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2101065943, now seen corresponding path program 90 times [2022-01-31 17:04:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220124353] [2022-01-31 17:04:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:28,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:28,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:28,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:28,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:30,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:30,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:30,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220124353] [2022-01-31 17:04:30,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [220124353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:30,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:30,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:04:30,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650353493] [2022-01-31 17:04:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:30,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:04:30,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:30,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:04:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:04:30,979 INFO L87 Difference]: Start difference. First operand 219 states and 229 transitions. Second operand has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:34,211 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2022-01-31 17:04:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:04:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 17:04:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:34,213 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:04:34,213 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 17:04:34,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:04:34,214 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:34,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 65 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 17:04:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-01-31 17:04:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.0511627906976744) internal successors, (226), 215 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 231 transitions. [2022-01-31 17:04:34,275 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 231 transitions. Word has length 205 [2022-01-31 17:04:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:34,275 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 231 transitions. [2022-01-31 17:04:34,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 231 transitions. [2022-01-31 17:04:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:04:34,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:34,276 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:34,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:04:34,276 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash -780992267, now seen corresponding path program 91 times [2022-01-31 17:04:34,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270231143] [2022-01-31 17:04:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:34,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:34,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:34,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:34,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:36,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:36,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270231143] [2022-01-31 17:04:36,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [270231143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:36,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:36,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:04:36,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381891881] [2022-01-31 17:04:36,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:36,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:04:36,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:04:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:04:36,954 INFO L87 Difference]: Start difference. First operand 221 states and 231 transitions. Second operand has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:40,235 INFO L93 Difference]: Finished difference Result 258 states and 278 transitions. [2022-01-31 17:04:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:04:40,235 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:04:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:40,236 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:04:40,236 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:04:40,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:04:40,237 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 65 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:04:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-01-31 17:04:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.0506912442396312) internal successors, (228), 217 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 233 transitions. [2022-01-31 17:04:40,300 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 233 transitions. Word has length 207 [2022-01-31 17:04:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:40,300 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 233 transitions. [2022-01-31 17:04:40,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 233 transitions. [2022-01-31 17:04:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:04:40,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:40,301 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:04:40,302 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -185026157, now seen corresponding path program 92 times [2022-01-31 17:04:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:40,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418297654] [2022-01-31 17:04:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:40,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:40,304 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:40,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:40,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:43,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418297654] [2022-01-31 17:04:43,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1418297654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:43,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:43,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:04:43,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186172142] [2022-01-31 17:04:43,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:43,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:04:43,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:04:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:04:43,050 INFO L87 Difference]: Start difference. First operand 223 states and 233 transitions. Second operand has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:46,390 INFO L93 Difference]: Finished difference Result 260 states and 280 transitions. [2022-01-31 17:04:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:04:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 17:04:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:46,391 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:04:46,391 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:04:46,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:04:46,393 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 208 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:46,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 55 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:04:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-01-31 17:04:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 219 states have (on average 1.0502283105022832) internal successors, (230), 219 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 235 transitions. [2022-01-31 17:04:46,446 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 235 transitions. Word has length 209 [2022-01-31 17:04:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:46,446 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 235 transitions. [2022-01-31 17:04:46,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 235 transitions. [2022-01-31 17:04:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:04:46,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:46,447 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:46,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:04:46,447 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1307755185, now seen corresponding path program 93 times [2022-01-31 17:04:46,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:46,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563992885] [2022-01-31 17:04:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:46,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:46,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:46,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:46,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:49,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:49,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563992885] [2022-01-31 17:04:49,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563992885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:49,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:49,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:04:49,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001336616] [2022-01-31 17:04:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:49,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:04:49,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:04:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:04:49,266 INFO L87 Difference]: Start difference. First operand 225 states and 235 transitions. Second operand has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:52,664 INFO L93 Difference]: Finished difference Result 262 states and 282 transitions. [2022-01-31 17:04:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:04:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:04:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:52,665 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:04:52,665 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 17:04:52,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:04:52,667 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:52,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 55 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 17:04:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-31 17:04:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.0497737556561086) internal successors, (232), 221 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 237 transitions. [2022-01-31 17:04:52,776 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 237 transitions. Word has length 211 [2022-01-31 17:04:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:52,776 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 237 transitions. [2022-01-31 17:04:52,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 237 transitions. [2022-01-31 17:04:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:04:52,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:52,777 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:52,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:04:52,778 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:52,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:52,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1351547983, now seen corresponding path program 94 times [2022-01-31 17:04:52,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:52,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723763363] [2022-01-31 17:04:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:52,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:52,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:52,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:52,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:55,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:55,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723763363] [2022-01-31 17:04:55,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [723763363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:55,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:55,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:04:55,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313081124] [2022-01-31 17:04:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:55,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:04:55,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:04:55,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:04:55,819 INFO L87 Difference]: Start difference. First operand 227 states and 237 transitions. Second operand has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:59,309 INFO L93 Difference]: Finished difference Result 264 states and 284 transitions. [2022-01-31 17:04:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:04:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 17:04:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:59,310 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:04:59,310 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 17:04:59,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:04:59,311 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:59,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 75 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 17:04:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-01-31 17:04:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.0493273542600896) internal successors, (234), 223 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 239 transitions. [2022-01-31 17:04:59,365 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 239 transitions. Word has length 213 [2022-01-31 17:04:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:59,366 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 239 transitions. [2022-01-31 17:04:59,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 239 transitions. [2022-01-31 17:04:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:04:59,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:59,367 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:04:59,367 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 486753901, now seen corresponding path program 95 times [2022-01-31 17:04:59,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493563560] [2022-01-31 17:04:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:59,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:59,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:59,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:59,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:02,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493563560] [2022-01-31 17:05:02,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [493563560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:02,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:02,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:05:02,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24289955] [2022-01-31 17:05:02,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:02,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:05:02,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:05:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:05:02,323 INFO L87 Difference]: Start difference. First operand 229 states and 239 transitions. Second operand has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:05,828 INFO L93 Difference]: Finished difference Result 266 states and 286 transitions. [2022-01-31 17:05:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:05:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:05:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:05,829 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:05:05,829 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:05:05,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:05:05,831 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 40 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:05:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-01-31 17:05:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.048888888888889) internal successors, (236), 225 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 17:05:05,898 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 215 [2022-01-31 17:05:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:05,898 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 17:05:05,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 17:05:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:05:05,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:05,899 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:05,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:05:05,900 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1651670773, now seen corresponding path program 96 times [2022-01-31 17:05:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:05,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693032199] [2022-01-31 17:05:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:05,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:05,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:05,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:05,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:08,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:08,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693032199] [2022-01-31 17:05:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693032199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:08,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:05:08,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653744377] [2022-01-31 17:05:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:05:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:05:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:05:08,861 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:12,478 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2022-01-31 17:05:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:05:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 17:05:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:12,480 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:05:12,480 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:05:12,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:05:12,482 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:12,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 50 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:05:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-01-31 17:05:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 227 states have (on average 1.0484581497797356) internal successors, (238), 227 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 243 transitions. [2022-01-31 17:05:12,541 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 243 transitions. Word has length 217 [2022-01-31 17:05:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:12,541 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 243 transitions. [2022-01-31 17:05:12,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 243 transitions. [2022-01-31 17:05:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:05:12,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:12,542 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:05:12,542 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 611552297, now seen corresponding path program 97 times [2022-01-31 17:05:12,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:12,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233920096] [2022-01-31 17:05:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:12,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:12,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:12,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:12,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:15,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233920096] [2022-01-31 17:05:15,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233920096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:15,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:15,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:05:15,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660050987] [2022-01-31 17:05:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:15,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:05:15,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:05:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:05:15,590 INFO L87 Difference]: Start difference. First operand 233 states and 243 transitions. Second operand has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:19,292 INFO L93 Difference]: Finished difference Result 270 states and 290 transitions. [2022-01-31 17:05:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:05:19,292 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:05:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:19,293 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:05:19,293 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 17:05:19,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:05:19,294 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:19,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 60 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:19,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 17:05:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-01-31 17:05:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.0480349344978166) internal successors, (240), 229 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 245 transitions. [2022-01-31 17:05:19,353 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 245 transitions. Word has length 219 [2022-01-31 17:05:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:19,353 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 245 transitions. [2022-01-31 17:05:19,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 245 transitions. [2022-01-31 17:05:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:05:19,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:19,354 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:19,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:05:19,354 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:19,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1979496505, now seen corresponding path program 98 times [2022-01-31 17:05:19,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734073046] [2022-01-31 17:05:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:19,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:19,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:19,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:19,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:22,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:22,487 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:22,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734073046] [2022-01-31 17:05:22,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734073046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:22,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:22,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:05:22,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116409885] [2022-01-31 17:05:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:22,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:05:22,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:05:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:05:22,490 INFO L87 Difference]: Start difference. First operand 235 states and 245 transitions. Second operand has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:26,256 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2022-01-31 17:05:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:05:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 17:05:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:26,257 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:05:26,257 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:05:26,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:05:26,259 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 220 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:26,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 55 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:05:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-01-31 17:05:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 231 states have (on average 1.0476190476190477) internal successors, (242), 231 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 247 transitions. [2022-01-31 17:05:26,343 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 247 transitions. Word has length 221 [2022-01-31 17:05:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:26,343 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 247 transitions. [2022-01-31 17:05:26,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 247 transitions. [2022-01-31 17:05:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:05:26,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:26,344 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:26,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:05:26,345 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash -896363547, now seen corresponding path program 99 times [2022-01-31 17:05:26,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:26,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186740051] [2022-01-31 17:05:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:26,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:26,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:26,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:26,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:29,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:29,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:29,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186740051] [2022-01-31 17:05:29,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186740051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:29,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:29,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:05:29,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831719036] [2022-01-31 17:05:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:29,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:05:29,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:05:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:05:29,518 INFO L87 Difference]: Start difference. First operand 237 states and 247 transitions. Second operand has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:33,514 INFO L93 Difference]: Finished difference Result 274 states and 294 transitions. [2022-01-31 17:05:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:05:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:05:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:33,516 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:05:33,516 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:05:33,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:05:33,519 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:33,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 50 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:05:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-31 17:05:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.0472103004291846) internal successors, (244), 233 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 249 transitions. [2022-01-31 17:05:33,612 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 249 transitions. Word has length 223 [2022-01-31 17:05:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:33,612 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 249 transitions. [2022-01-31 17:05:33,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 249 transitions. [2022-01-31 17:05:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:05:33,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:33,613 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:33,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:05:33,613 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 612323459, now seen corresponding path program 100 times [2022-01-31 17:05:33,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:33,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532338029] [2022-01-31 17:05:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:33,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:33,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:33,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:33,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:36,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:36,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532338029] [2022-01-31 17:05:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532338029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:36,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:36,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:05:36,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827916494] [2022-01-31 17:05:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:36,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:05:36,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:05:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:05:36,893 INFO L87 Difference]: Start difference. First operand 239 states and 249 transitions. Second operand has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:40,803 INFO L93 Difference]: Finished difference Result 276 states and 296 transitions. [2022-01-31 17:05:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:05:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 17:05:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:40,804 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:05:40,804 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 17:05:40,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:05:40,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:40,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 60 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 17:05:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-01-31 17:05:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.0468085106382978) internal successors, (246), 235 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 251 transitions. [2022-01-31 17:05:40,868 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 251 transitions. Word has length 225 [2022-01-31 17:05:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:40,868 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 251 transitions. [2022-01-31 17:05:40,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 251 transitions. [2022-01-31 17:05:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:05:40,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:40,869 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:40,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:05:40,869 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1238409823, now seen corresponding path program 101 times [2022-01-31 17:05:40,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:40,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393316215] [2022-01-31 17:05:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:40,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:40,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:40,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:40,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:44,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:44,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393316215] [2022-01-31 17:05:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [393316215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:44,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:05:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133674926] [2022-01-31 17:05:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:44,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:05:44,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:05:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:05:44,155 INFO L87 Difference]: Start difference. First operand 241 states and 251 transitions. Second operand has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:48,122 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2022-01-31 17:05:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:05:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:05:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:48,123 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:05:48,123 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:05:48,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:05:48,124 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:48,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 50 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:05:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-01-31 17:05:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.0464135021097047) internal successors, (248), 237 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 253 transitions. [2022-01-31 17:05:48,187 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 253 transitions. Word has length 227 [2022-01-31 17:05:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:48,187 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 253 transitions. [2022-01-31 17:05:48,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 253 transitions. [2022-01-31 17:05:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:05:48,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:48,188 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:48,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:05:48,189 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1676633281, now seen corresponding path program 102 times [2022-01-31 17:05:48,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:48,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606228289] [2022-01-31 17:05:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:48,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:48,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:48,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:48,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:51,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606228289] [2022-01-31 17:05:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [606228289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:51,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:05:51,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497784714] [2022-01-31 17:05:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:51,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:05:51,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:05:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:05:51,541 INFO L87 Difference]: Start difference. First operand 243 states and 253 transitions. Second operand has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:55,580 INFO L93 Difference]: Finished difference Result 280 states and 300 transitions. [2022-01-31 17:05:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:05:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 17:05:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:55,581 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:05:55,581 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 17:05:55,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:05:55,583 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:55,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 50 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 17:05:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-01-31 17:05:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.0460251046025104) internal successors, (250), 239 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2022-01-31 17:05:55,662 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 229 [2022-01-31 17:05:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:55,663 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2022-01-31 17:05:55,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2022-01-31 17:05:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:05:55,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:55,663 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:55,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:05:55,664 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1902581411, now seen corresponding path program 103 times [2022-01-31 17:05:55,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891158021] [2022-01-31 17:05:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:55,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:55,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:55,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:55,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:59,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:59,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891158021] [2022-01-31 17:05:59,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891158021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:59,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:59,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:05:59,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895322826] [2022-01-31 17:05:59,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:59,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:05:59,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:05:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:05:59,070 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:03,223 INFO L93 Difference]: Finished difference Result 282 states and 302 transitions. [2022-01-31 17:06:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:06:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:06:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:03,224 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:06:03,224 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:06:03,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:06:03,226 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:03,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 55 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:06:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 17:06:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.045643153526971) internal successors, (252), 241 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 257 transitions. [2022-01-31 17:06:03,326 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 257 transitions. Word has length 231 [2022-01-31 17:06:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:03,326 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 257 transitions. [2022-01-31 17:06:03,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 257 transitions. [2022-01-31 17:06:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:06:03,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:03,327 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:03,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:06:03,327 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash 4597755, now seen corresponding path program 104 times [2022-01-31 17:06:03,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043086761] [2022-01-31 17:06:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:03,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:03,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:03,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:03,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:06,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043086761] [2022-01-31 17:06:06,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043086761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:06,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:06,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:06:06,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854766962] [2022-01-31 17:06:06,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:06,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:06:06,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:06,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:06:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:06:06,868 INFO L87 Difference]: Start difference. First operand 247 states and 257 transitions. Second operand has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:11,054 INFO L93 Difference]: Finished difference Result 284 states and 304 transitions. [2022-01-31 17:06:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:06:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 17:06:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:11,055 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:06:11,055 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 17:06:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:06:11,057 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 232 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:11,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 55 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 17:06:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-01-31 17:06:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.045267489711934) internal successors, (254), 243 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 259 transitions. [2022-01-31 17:06:11,140 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 259 transitions. Word has length 233 [2022-01-31 17:06:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:11,140 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 259 transitions. [2022-01-31 17:06:11,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 259 transitions. [2022-01-31 17:06:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:06:11,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:11,141 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:11,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:06:11,141 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1147259111, now seen corresponding path program 105 times [2022-01-31 17:06:11,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212999895] [2022-01-31 17:06:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:11,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:11,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:11,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:11,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:14,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:14,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212999895] [2022-01-31 17:06:14,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212999895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:14,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:14,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:06:14,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648119943] [2022-01-31 17:06:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:14,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:06:14,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:06:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:06:14,693 INFO L87 Difference]: Start difference. First operand 249 states and 259 transitions. Second operand has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:18,974 INFO L93 Difference]: Finished difference Result 286 states and 306 transitions. [2022-01-31 17:06:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:06:18,975 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:06:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:18,975 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:06:18,975 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 17:06:18,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:06:18,977 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:18,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 45 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 17:06:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2022-01-31 17:06:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 245 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 261 transitions. [2022-01-31 17:06:19,044 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 261 transitions. Word has length 235 [2022-01-31 17:06:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:19,045 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 261 transitions. [2022-01-31 17:06:19,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 261 transitions. [2022-01-31 17:06:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:06:19,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:19,045 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:06:19,046 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 19855031, now seen corresponding path program 106 times [2022-01-31 17:06:19,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:19,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115769674] [2022-01-31 17:06:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:19,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:19,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:19,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:19,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:22,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:22,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115769674] [2022-01-31 17:06:22,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115769674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:22,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:22,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:06:22,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979111362] [2022-01-31 17:06:22,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:22,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:06:22,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:06:22,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:06:22,643 INFO L87 Difference]: Start difference. First operand 251 states and 261 transitions. Second operand has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:27,014 INFO L93 Difference]: Finished difference Result 288 states and 308 transitions. [2022-01-31 17:06:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:06:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 17:06:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:27,015 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:06:27,015 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:06:27,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:06:27,018 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 236 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:27,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 80 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:06:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:06:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-01-31 17:06:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 247 states have (on average 1.0445344129554657) internal successors, (258), 247 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 17:06:27,098 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 237 [2022-01-31 17:06:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:27,098 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 17:06:27,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 17:06:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:06:27,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:27,099 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:27,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:06:27,099 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 630081237, now seen corresponding path program 107 times [2022-01-31 17:06:27,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:27,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323631846] [2022-01-31 17:06:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:27,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:27,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:27,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:27,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:30,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:30,787 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323631846] [2022-01-31 17:06:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1323631846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:30,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:30,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:06:30,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563870728] [2022-01-31 17:06:30,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:30,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:06:30,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:06:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:06:30,790 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:35,256 INFO L93 Difference]: Finished difference Result 290 states and 310 transitions. [2022-01-31 17:06:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:06:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:06:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:35,257 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:06:35,257 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:06:35,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:06:35,259 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 238 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:35,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 65 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:06:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-01-31 17:06:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.0441767068273093) internal successors, (260), 249 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 265 transitions. [2022-01-31 17:06:35,330 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 265 transitions. Word has length 239 [2022-01-31 17:06:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:35,330 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 265 transitions. [2022-01-31 17:06:35,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 265 transitions. [2022-01-31 17:06:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:06:35,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:35,331 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:35,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:06:35,331 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1353054349, now seen corresponding path program 108 times [2022-01-31 17:06:35,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:35,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58251035] [2022-01-31 17:06:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:35,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:35,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:35,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:35,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:39,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58251035] [2022-01-31 17:06:39,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [58251035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:39,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:39,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:06:39,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133506133] [2022-01-31 17:06:39,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:39,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:06:39,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:06:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:06:39,066 INFO L87 Difference]: Start difference. First operand 255 states and 265 transitions. Second operand has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:43,627 INFO L93 Difference]: Finished difference Result 292 states and 312 transitions. [2022-01-31 17:06:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:06:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 17:06:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:43,629 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:06:43,629 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:06:43,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:06:43,631 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 240 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:43,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 75 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:06:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:06:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 17:06:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.043824701195219) internal successors, (262), 251 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 267 transitions. [2022-01-31 17:06:43,714 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 267 transitions. Word has length 241 [2022-01-31 17:06:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:43,714 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 267 transitions. [2022-01-31 17:06:43,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 267 transitions. [2022-01-31 17:06:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:06:43,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:43,715 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:43,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:06:43,715 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash -180873071, now seen corresponding path program 109 times [2022-01-31 17:06:43,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:43,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314656390] [2022-01-31 17:06:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:43,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:43,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:43,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:43,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:47,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:47,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314656390] [2022-01-31 17:06:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314656390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:47,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:47,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:06:47,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351493597] [2022-01-31 17:06:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:06:47,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:06:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:06:47,560 INFO L87 Difference]: Start difference. First operand 257 states and 267 transitions. Second operand has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:52,175 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2022-01-31 17:06:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:06:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:06:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:52,176 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:06:52,176 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 17:06:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:06:52,178 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 242 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:52,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 55 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 17:06:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-01-31 17:06:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.0434782608695652) internal successors, (264), 253 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 269 transitions. [2022-01-31 17:06:52,261 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 269 transitions. Word has length 243 [2022-01-31 17:06:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:52,262 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 269 transitions. [2022-01-31 17:06:52,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 269 transitions. [2022-01-31 17:06:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:06:52,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:52,263 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:52,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:06:52,263 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1003903535, now seen corresponding path program 110 times [2022-01-31 17:06:52,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:52,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763056283] [2022-01-31 17:06:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:52,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:52,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:52,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:52,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:56,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:56,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763056283] [2022-01-31 17:06:56,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [763056283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:56,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:56,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:06:56,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008350574] [2022-01-31 17:06:56,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:56,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:06:56,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:06:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:06:56,109 INFO L87 Difference]: Start difference. First operand 259 states and 269 transitions. Second operand has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:00,830 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2022-01-31 17:07:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:07:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 17:07:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:00,831 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:07:00,832 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 17:07:00,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:07:00,835 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:00,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 75 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:07:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 17:07:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-01-31 17:07:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.0431372549019609) internal successors, (266), 255 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 271 transitions. [2022-01-31 17:07:00,918 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 271 transitions. Word has length 245 [2022-01-31 17:07:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:00,918 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 271 transitions. [2022-01-31 17:07:00,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 271 transitions. [2022-01-31 17:07:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:07:00,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:00,919 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:00,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:07:00,919 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1407888461, now seen corresponding path program 111 times [2022-01-31 17:07:00,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135337001] [2022-01-31 17:07:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:00,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:00,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:00,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:00,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:04,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135337001] [2022-01-31 17:07:04,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135337001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:04,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:04,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:07:04,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69282729] [2022-01-31 17:07:04,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:07:04,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:07:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:07:04,902 INFO L87 Difference]: Start difference. First operand 261 states and 271 transitions. Second operand has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:09,682 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2022-01-31 17:07:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:07:09,682 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:07:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:09,683 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:07:09,683 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:07:09,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:07:09,685 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 246 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:09,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 65 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:07:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2022-01-31 17:07:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.0428015564202335) internal successors, (268), 257 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 273 transitions. [2022-01-31 17:07:09,769 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 273 transitions. Word has length 247 [2022-01-31 17:07:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:09,769 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 273 transitions. [2022-01-31 17:07:09,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 273 transitions. [2022-01-31 17:07:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:07:09,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:09,770 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:09,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:07:09,770 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1204621589, now seen corresponding path program 112 times [2022-01-31 17:07:09,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770169331] [2022-01-31 17:07:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:09,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:09,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:09,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:13,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:13,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:13,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770169331] [2022-01-31 17:07:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770169331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:13,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:13,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:07:13,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011623604] [2022-01-31 17:07:13,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:13,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:07:13,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:07:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:07:13,772 INFO L87 Difference]: Start difference. First operand 263 states and 273 transitions. Second operand has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:18,678 INFO L93 Difference]: Finished difference Result 300 states and 320 transitions. [2022-01-31 17:07:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:07:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 17:07:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:18,679 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:07:18,679 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 17:07:18,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:07:18,681 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:18,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 50 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 17:07:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-01-31 17:07:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.0424710424710424) internal successors, (270), 259 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 275 transitions. [2022-01-31 17:07:18,758 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 275 transitions. Word has length 249 [2022-01-31 17:07:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:18,758 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 275 transitions. [2022-01-31 17:07:18,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 275 transitions. [2022-01-31 17:07:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:07:18,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:18,759 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:18,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:07:18,759 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 729088521, now seen corresponding path program 113 times [2022-01-31 17:07:18,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546116649] [2022-01-31 17:07:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:18,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:18,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:18,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:18,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:22,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:22,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546116649] [2022-01-31 17:07:22,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546116649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:22,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:22,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:07:22,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855998158] [2022-01-31 17:07:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:22,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:07:22,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:07:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:07:22,846 INFO L87 Difference]: Start difference. First operand 265 states and 275 transitions. Second operand has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:27,789 INFO L93 Difference]: Finished difference Result 302 states and 322 transitions. [2022-01-31 17:07:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:07:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:07:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:27,790 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:07:27,790 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:07:27,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:07:27,792 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 250 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:27,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 70 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:07:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:07:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-01-31 17:07:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.0421455938697317) internal successors, (272), 261 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 277 transitions. [2022-01-31 17:07:27,869 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 277 transitions. Word has length 251 [2022-01-31 17:07:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:27,869 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 277 transitions. [2022-01-31 17:07:27,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 277 transitions. [2022-01-31 17:07:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:07:27,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:27,870 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:27,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:07:27,870 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash -696334937, now seen corresponding path program 114 times [2022-01-31 17:07:27,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:27,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366957537] [2022-01-31 17:07:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:27,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:27,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:27,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:27,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:32,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:32,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366957537] [2022-01-31 17:07:32,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366957537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:32,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:32,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:07:32,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253248467] [2022-01-31 17:07:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:07:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:07:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:07:32,054 INFO L87 Difference]: Start difference. First operand 267 states and 277 transitions. Second operand has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:37,117 INFO L93 Difference]: Finished difference Result 304 states and 324 transitions. [2022-01-31 17:07:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:07:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 17:07:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:37,118 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:07:37,118 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:07:37,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:07:37,122 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:37,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 50 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:07:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2022-01-31 17:07:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 263 states have (on average 1.0418250950570342) internal successors, (274), 263 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 279 transitions. [2022-01-31 17:07:37,233 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 279 transitions. Word has length 253 [2022-01-31 17:07:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 279 transitions. [2022-01-31 17:07:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 279 transitions. [2022-01-31 17:07:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:07:37,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:37,236 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:37,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:07:37,236 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash -433710651, now seen corresponding path program 115 times [2022-01-31 17:07:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:37,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976532931] [2022-01-31 17:07:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:37,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:37,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:37,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:37,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:41,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:41,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:41,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976532931] [2022-01-31 17:07:41,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [976532931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:41,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:41,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:07:41,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694123388] [2022-01-31 17:07:41,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:41,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:07:41,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:07:41,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:07:41,455 INFO L87 Difference]: Start difference. First operand 269 states and 279 transitions. Second operand has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:46,532 INFO L93 Difference]: Finished difference Result 306 states and 326 transitions. [2022-01-31 17:07:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:07:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:07:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:46,533 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:07:46,533 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:07:46,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:07:46,535 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 254 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:46,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 50 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:07:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-01-31 17:07:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.0415094339622641) internal successors, (276), 265 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 281 transitions. [2022-01-31 17:07:46,616 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 281 transitions. Word has length 255 [2022-01-31 17:07:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:46,616 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 281 transitions. [2022-01-31 17:07:46,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 281 transitions. [2022-01-31 17:07:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:07:46,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:46,617 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:46,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:07:46,617 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1454842269, now seen corresponding path program 116 times [2022-01-31 17:07:46,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:46,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53005202] [2022-01-31 17:07:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:46,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:46,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:46,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:46,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:50,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:50,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53005202] [2022-01-31 17:07:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [53005202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:50,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:50,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:07:50,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61487843] [2022-01-31 17:07:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:50,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:07:50,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:07:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:07:50,921 INFO L87 Difference]: Start difference. First operand 271 states and 281 transitions. Second operand has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:56,103 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2022-01-31 17:07:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:07:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 17:07:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:56,104 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:07:56,104 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:07:56,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:07:56,105 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 256 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 60 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:07:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:07:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2022-01-31 17:07:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 267 states have (on average 1.0411985018726593) internal successors, (278), 267 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 283 transitions. [2022-01-31 17:07:56,187 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 283 transitions. Word has length 257 [2022-01-31 17:07:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:56,187 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 283 transitions. [2022-01-31 17:07:56,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 283 transitions. [2022-01-31 17:07:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:07:56,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:56,188 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:07:56,188 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash 785183617, now seen corresponding path program 117 times [2022-01-31 17:07:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546599373] [2022-01-31 17:07:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:56,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:56,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:56,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:56,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:00,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546599373] [2022-01-31 17:08:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546599373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:00,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:00,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:08:00,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231378316] [2022-01-31 17:08:00,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:08:00,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:08:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:08:00,550 INFO L87 Difference]: Start difference. First operand 273 states and 283 transitions. Second operand has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:05,811 INFO L93 Difference]: Finished difference Result 310 states and 330 transitions. [2022-01-31 17:08:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:08:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:08:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:05,812 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:08:05,812 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 17:08:05,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:08:05,815 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:05,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 60 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:08:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 17:08:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-01-31 17:08:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 269 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 285 transitions. [2022-01-31 17:08:05,911 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 285 transitions. Word has length 259 [2022-01-31 17:08:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:05,911 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 285 transitions. [2022-01-31 17:08:05,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 285 transitions. [2022-01-31 17:08:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:08:05,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:05,912 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:08:05,912 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1671444767, now seen corresponding path program 118 times [2022-01-31 17:08:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422326320] [2022-01-31 17:08:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:05,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:05,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:05,921 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:10,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:10,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:10,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422326320] [2022-01-31 17:08:10,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422326320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:10,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:10,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:08:10,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773750247] [2022-01-31 17:08:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:10,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:08:10,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:08:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:08:10,326 INFO L87 Difference]: Start difference. First operand 275 states and 285 transitions. Second operand has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:15,712 INFO L93 Difference]: Finished difference Result 312 states and 332 transitions. [2022-01-31 17:08:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:08:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 17:08:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:15,713 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:08:15,713 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 17:08:15,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:08:15,716 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 260 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:15,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 80 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:08:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 17:08:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-01-31 17:08:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.040590405904059) internal successors, (282), 271 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 287 transitions. [2022-01-31 17:08:15,813 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 287 transitions. Word has length 261 [2022-01-31 17:08:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:15,813 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 287 transitions. [2022-01-31 17:08:15,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 287 transitions. [2022-01-31 17:08:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:08:15,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:15,814 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:15,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:08:15,814 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1330081987, now seen corresponding path program 119 times [2022-01-31 17:08:15,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632902641] [2022-01-31 17:08:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:15,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:15,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:15,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:15,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:20,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:20,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:20,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632902641] [2022-01-31 17:08:20,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632902641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:20,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:20,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:08:20,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891341424] [2022-01-31 17:08:20,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:20,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:08:20,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:08:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:08:20,292 INFO L87 Difference]: Start difference. First operand 277 states and 287 transitions. Second operand has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:25,723 INFO L93 Difference]: Finished difference Result 314 states and 334 transitions. [2022-01-31 17:08:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:08:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:08:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:25,724 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:08:25,724 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:08:25,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:08:25,727 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 262 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:25,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 65 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:08:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:08:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2022-01-31 17:08:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.0402930402930404) internal successors, (284), 273 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 289 transitions. [2022-01-31 17:08:25,815 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 289 transitions. Word has length 263 [2022-01-31 17:08:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:25,815 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 289 transitions. [2022-01-31 17:08:25,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 289 transitions. [2022-01-31 17:08:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:08:25,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:25,816 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:25,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:08:25,816 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 420730331, now seen corresponding path program 120 times [2022-01-31 17:08:25,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:25,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092818821] [2022-01-31 17:08:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:25,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:25,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:25,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:25,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:30,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:30,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092818821] [2022-01-31 17:08:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092818821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:30,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:08:30,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695935007] [2022-01-31 17:08:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:30,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:08:30,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:08:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:08:30,395 INFO L87 Difference]: Start difference. First operand 279 states and 289 transitions. Second operand has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:35,920 INFO L93 Difference]: Finished difference Result 316 states and 336 transitions. [2022-01-31 17:08:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:08:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 17:08:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:35,921 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:08:35,921 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:08:35,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:08:35,923 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:35,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 60 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:08:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:08:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-01-31 17:08:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.04) internal successors, (286), 275 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 291 transitions. [2022-01-31 17:08:36,012 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 291 transitions. Word has length 265 [2022-01-31 17:08:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:36,012 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 291 transitions. [2022-01-31 17:08:36,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 291 transitions. [2022-01-31 17:08:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:08:36,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:36,013 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:36,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:08:36,013 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -675812103, now seen corresponding path program 121 times [2022-01-31 17:08:36,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032850123] [2022-01-31 17:08:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:36,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:36,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:36,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:36,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:40,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:40,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:40,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032850123] [2022-01-31 17:08:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032850123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:40,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:40,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:08:40,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752410993] [2022-01-31 17:08:40,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:08:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:08:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:08:40,654 INFO L87 Difference]: Start difference. First operand 281 states and 291 transitions. Second operand has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:46,248 INFO L93 Difference]: Finished difference Result 318 states and 338 transitions. [2022-01-31 17:08:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:08:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:08:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:46,249 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:08:46,249 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 17:08:46,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:08:46,251 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:46,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 60 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:08:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 17:08:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-01-31 17:08:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.03971119133574) internal successors, (288), 277 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 293 transitions. [2022-01-31 17:08:46,343 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 293 transitions. Word has length 267 [2022-01-31 17:08:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 293 transitions. [2022-01-31 17:08:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 293 transitions. [2022-01-31 17:08:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:08:46,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:46,344 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:46,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:08:46,344 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2108863639, now seen corresponding path program 122 times [2022-01-31 17:08:46,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:46,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075941759] [2022-01-31 17:08:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:46,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:46,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:46,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:46,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:51,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075941759] [2022-01-31 17:08:51,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075941759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:51,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:51,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:08:51,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209047611] [2022-01-31 17:08:51,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:51,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:08:51,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:08:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:08:51,144 INFO L87 Difference]: Start difference. First operand 283 states and 293 transitions. Second operand has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:56,779 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2022-01-31 17:08:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:08:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 17:08:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:56,781 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:08:56,781 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:08:56,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:08:56,783 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:56,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:08:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-01-31 17:08:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 279 states have (on average 1.039426523297491) internal successors, (290), 279 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 295 transitions. [2022-01-31 17:08:56,887 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 295 transitions. Word has length 269 [2022-01-31 17:08:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:56,887 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 295 transitions. [2022-01-31 17:08:56,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 295 transitions. [2022-01-31 17:08:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:08:56,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:56,888 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:56,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:08:56,888 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1877341003, now seen corresponding path program 123 times [2022-01-31 17:08:56,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:56,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223218829] [2022-01-31 17:08:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:56,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:56,890 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:56,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:56,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:01,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:01,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223218829] [2022-01-31 17:09:01,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223218829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:01,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:01,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:09:01,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271148475] [2022-01-31 17:09:01,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:09:01,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:09:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:09:01,668 INFO L87 Difference]: Start difference. First operand 285 states and 295 transitions. Second operand has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:08,014 INFO L93 Difference]: Finished difference Result 322 states and 342 transitions. [2022-01-31 17:09:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:09:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:09:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:08,015 INFO L225 Difference]: With dead ends: 322 [2022-01-31 17:09:08,015 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:09:08,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:09:08,018 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 270 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:08,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 65 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:09:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-01-31 17:09:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.0391459074733096) internal successors, (292), 281 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 297 transitions. [2022-01-31 17:09:08,128 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 297 transitions. Word has length 271 [2022-01-31 17:09:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 297 transitions. [2022-01-31 17:09:08,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 297 transitions. [2022-01-31 17:09:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:09:08,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:08,130 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:08,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:09:08,130 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:08,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1509173933, now seen corresponding path program 124 times [2022-01-31 17:09:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:08,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576994228] [2022-01-31 17:09:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:08,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:08,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:08,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:08,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:13,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:13,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576994228] [2022-01-31 17:09:13,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576994228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:13,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:13,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:09:13,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265570869] [2022-01-31 17:09:13,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:13,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:09:13,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:09:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:09:13,160 INFO L87 Difference]: Start difference. First operand 287 states and 297 transitions. Second operand has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:19,761 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2022-01-31 17:09:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:09:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 17:09:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:19,762 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:09:19,762 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 17:09:19,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:09:19,765 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 272 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:19,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 60 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 17:09:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-01-31 17:09:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 283 states have (on average 1.03886925795053) internal successors, (294), 283 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 299 transitions. [2022-01-31 17:09:19,887 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 299 transitions. Word has length 273 [2022-01-31 17:09:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:19,888 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 299 transitions. [2022-01-31 17:09:19,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 299 transitions. [2022-01-31 17:09:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:09:19,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:19,889 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:19,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:09:19,889 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash 112062065, now seen corresponding path program 125 times [2022-01-31 17:09:19,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593095649] [2022-01-31 17:09:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:19,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:19,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:19,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:19,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:25,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593095649] [2022-01-31 17:09:25,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593095649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:25,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:25,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:09:25,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795202837] [2022-01-31 17:09:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:25,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:09:25,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:09:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:09:25,350 INFO L87 Difference]: Start difference. First operand 289 states and 299 transitions. Second operand has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:31,548 INFO L93 Difference]: Finished difference Result 326 states and 346 transitions. [2022-01-31 17:09:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:09:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:09:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:31,549 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:09:31,549 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 17:09:31,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:09:31,551 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 274 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:31,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 65 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 17:09:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-01-31 17:09:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.03859649122807) internal successors, (296), 285 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 301 transitions. [2022-01-31 17:09:31,646 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 301 transitions. Word has length 275 [2022-01-31 17:09:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:31,646 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 301 transitions. [2022-01-31 17:09:31,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 301 transitions. [2022-01-31 17:09:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:09:31,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:31,647 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:31,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:09:31,647 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -953272305, now seen corresponding path program 126 times [2022-01-31 17:09:31,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:31,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535579477] [2022-01-31 17:09:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:31,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:31,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:31,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:31,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:36,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535579477] [2022-01-31 17:09:36,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [535579477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:36,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:36,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:09:36,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144406117] [2022-01-31 17:09:36,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:36,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:09:36,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:36,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:09:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:09:36,742 INFO L87 Difference]: Start difference. First operand 291 states and 301 transitions. Second operand has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:43,240 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-01-31 17:09:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:09:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 17:09:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:43,241 INFO L225 Difference]: With dead ends: 328 [2022-01-31 17:09:43,241 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:09:43,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:09:43,243 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 276 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:43,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 50 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:09:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-01-31 17:09:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 287 states have (on average 1.038327526132404) internal successors, (298), 287 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 303 transitions. [2022-01-31 17:09:43,355 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 303 transitions. Word has length 277 [2022-01-31 17:09:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:43,355 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 303 transitions. [2022-01-31 17:09:43,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 303 transitions. [2022-01-31 17:09:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:09:43,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:43,356 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:43,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:09:43,356 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1757581869, now seen corresponding path program 127 times [2022-01-31 17:09:43,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984616490] [2022-01-31 17:09:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:43,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:43,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:43,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:43,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:48,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:48,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984616490] [2022-01-31 17:09:48,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984616490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:48,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:48,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:09:48,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642336870] [2022-01-31 17:09:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:48,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:09:48,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:09:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:09:48,837 INFO L87 Difference]: Start difference. First operand 293 states and 303 transitions. Second operand has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:55,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:55,328 INFO L93 Difference]: Finished difference Result 330 states and 350 transitions. [2022-01-31 17:09:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:09:55,329 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:09:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:55,329 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:09:55,329 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:09:55,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:09:55,332 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:55,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 55 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:09:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-01-31 17:09:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.0380622837370241) internal successors, (300), 289 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 305 transitions. [2022-01-31 17:09:55,435 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 305 transitions. Word has length 279 [2022-01-31 17:09:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:55,435 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 305 transitions. [2022-01-31 17:09:55,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 305 transitions. [2022-01-31 17:09:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:09:55,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:55,447 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:09:55,447 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -156705589, now seen corresponding path program 128 times [2022-01-31 17:09:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:55,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165817507] [2022-01-31 17:09:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:55,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:55,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:55,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:55,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:01,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165817507] [2022-01-31 17:10:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [165817507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:01,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:01,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:10:01,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163245151] [2022-01-31 17:10:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:10:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:10:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:10:01,865 INFO L87 Difference]: Start difference. First operand 295 states and 305 transitions. Second operand has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:08,239 INFO L93 Difference]: Finished difference Result 332 states and 352 transitions. [2022-01-31 17:10:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:10:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 17:10:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:08,240 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:10:08,240 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:10:08,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:10:08,243 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:08,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 60 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:10:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-01-31 17:10:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.0378006872852235) internal successors, (302), 291 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 307 transitions. [2022-01-31 17:10:08,356 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 307 transitions. Word has length 281 [2022-01-31 17:10:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:08,356 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 307 transitions. [2022-01-31 17:10:08,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 307 transitions. [2022-01-31 17:10:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:10:08,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:08,357 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:08,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:10:08,357 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1540950039, now seen corresponding path program 129 times [2022-01-31 17:10:08,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405732504] [2022-01-31 17:10:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:08,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:08,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:08,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:08,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:13,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:13,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405732504] [2022-01-31 17:10:13,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405732504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:13,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:13,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:10:13,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606116100] [2022-01-31 17:10:13,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:13,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:10:13,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:10:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:10:13,993 INFO L87 Difference]: Start difference. First operand 297 states and 307 transitions. Second operand has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:20,492 INFO L93 Difference]: Finished difference Result 334 states and 354 transitions. [2022-01-31 17:10:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:10:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:10:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:20,493 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:10:20,493 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 17:10:20,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:10:20,496 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 282 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:20,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 65 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 17:10:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-01-31 17:10:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 293 states have (on average 1.0375426621160408) internal successors, (304), 293 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 309 transitions. [2022-01-31 17:10:20,611 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 309 transitions. Word has length 283 [2022-01-31 17:10:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:20,611 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 309 transitions. [2022-01-31 17:10:20,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 309 transitions. [2022-01-31 17:10:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:10:20,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:20,612 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:20,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:10:20,612 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash -360004729, now seen corresponding path program 130 times [2022-01-31 17:10:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:20,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841086038] [2022-01-31 17:10:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:20,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:20,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:20,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:20,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:26,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841086038] [2022-01-31 17:10:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841086038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:26,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:26,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:10:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177467262] [2022-01-31 17:10:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:10:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:10:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:10:26,207 INFO L87 Difference]: Start difference. First operand 299 states and 309 transitions. Second operand has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:33,011 INFO L93 Difference]: Finished difference Result 336 states and 356 transitions. [2022-01-31 17:10:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:10:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 17:10:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:33,012 INFO L225 Difference]: With dead ends: 336 [2022-01-31 17:10:33,012 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 17:10:33,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:10:33,016 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:33,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 50 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 17:10:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-01-31 17:10:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.0372881355932204) internal successors, (306), 295 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 311 transitions. [2022-01-31 17:10:33,213 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 311 transitions. Word has length 285 [2022-01-31 17:10:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:33,213 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 311 transitions. [2022-01-31 17:10:33,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 311 transitions. [2022-01-31 17:10:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:10:33,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:33,214 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:33,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:10:33,214 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 657072037, now seen corresponding path program 131 times [2022-01-31 17:10:33,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801345756] [2022-01-31 17:10:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:33,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:33,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:33,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:39,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801345756] [2022-01-31 17:10:39,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801345756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:39,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:39,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:10:39,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065548075] [2022-01-31 17:10:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:39,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:10:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:10:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:10:39,044 INFO L87 Difference]: Start difference. First operand 301 states and 311 transitions. Second operand has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:45,910 INFO L93 Difference]: Finished difference Result 338 states and 358 transitions. [2022-01-31 17:10:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:10:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:10:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:45,911 INFO L225 Difference]: With dead ends: 338 [2022-01-31 17:10:45,911 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:10:45,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:10:45,914 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:45,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 85 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:10:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-01-31 17:10:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.037037037037037) internal successors, (308), 297 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 313 transitions. [2022-01-31 17:10:46,035 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 313 transitions. Word has length 287 [2022-01-31 17:10:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:46,035 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 313 transitions. [2022-01-31 17:10:46,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 313 transitions. [2022-01-31 17:10:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:10:46,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:46,036 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:46,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:10:46,036 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1184699325, now seen corresponding path program 132 times [2022-01-31 17:10:46,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096388067] [2022-01-31 17:10:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:46,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:46,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:46,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:46,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:51,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096388067] [2022-01-31 17:10:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096388067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:51,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:51,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:10:51,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135108534] [2022-01-31 17:10:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:51,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:10:51,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:10:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:10:51,541 INFO L87 Difference]: Start difference. First operand 303 states and 313 transitions. Second operand has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:58,115 INFO L93 Difference]: Finished difference Result 340 states and 360 transitions. [2022-01-31 17:10:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:10:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 17:10:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:58,116 INFO L225 Difference]: With dead ends: 340 [2022-01-31 17:10:58,116 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 17:10:58,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:10:58,119 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 288 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:58,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 50 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 17:10:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2022-01-31 17:10:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 299 states have (on average 1.0367892976588629) internal successors, (310), 299 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 315 transitions. [2022-01-31 17:10:58,244 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 315 transitions. Word has length 289 [2022-01-31 17:10:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:58,244 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 315 transitions. [2022-01-31 17:10:58,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 315 transitions. [2022-01-31 17:10:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:10:58,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:58,245 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:58,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:10:58,245 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1600452255, now seen corresponding path program 133 times [2022-01-31 17:10:58,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:58,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17827520] [2022-01-31 17:10:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:58,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:58,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:58,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:58,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:03,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:03,849 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17827520] [2022-01-31 17:11:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [17827520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:03,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:11:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210515610] [2022-01-31 17:11:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:03,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:11:03,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:11:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:11:03,852 INFO L87 Difference]: Start difference. First operand 305 states and 315 transitions. Second operand has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:10,514 INFO L93 Difference]: Finished difference Result 342 states and 362 transitions. [2022-01-31 17:11:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:11:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:11:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:10,515 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:11:10,515 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 17:11:10,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:11:10,518 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 290 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:10,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 55 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 17:11:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-01-31 17:11:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.0365448504983388) internal successors, (312), 301 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2022-01-31 17:11:10,644 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 291 [2022-01-31 17:11:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2022-01-31 17:11:10,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2022-01-31 17:11:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:11:10,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:10,645 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:10,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:11:10,645 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:10,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1707059457, now seen corresponding path program 134 times [2022-01-31 17:11:10,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560856645] [2022-01-31 17:11:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:10,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:10,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:10,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:10,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:16,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:16,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:16,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560856645] [2022-01-31 17:11:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560856645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:16,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:11:16,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006447065] [2022-01-31 17:11:16,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:16,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:11:16,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:11:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:11:16,297 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:23,113 INFO L93 Difference]: Finished difference Result 344 states and 364 transitions. [2022-01-31 17:11:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:11:23,113 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 17:11:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:23,114 INFO L225 Difference]: With dead ends: 344 [2022-01-31 17:11:23,114 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:11:23,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:11:23,116 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 292 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:23,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 55 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:11:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2022-01-31 17:11:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.0363036303630364) internal successors, (314), 303 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 319 transitions. [2022-01-31 17:11:23,226 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 319 transitions. Word has length 293 [2022-01-31 17:11:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:23,226 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 319 transitions. [2022-01-31 17:11:23,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 319 transitions. [2022-01-31 17:11:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:11:23,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:23,227 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:23,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:11:23,227 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1077365475, now seen corresponding path program 135 times [2022-01-31 17:11:23,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106087735] [2022-01-31 17:11:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:23,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:23,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:23,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:23,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:28,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106087735] [2022-01-31 17:11:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106087735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:28,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:28,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:11:28,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661483175] [2022-01-31 17:11:28,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:28,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:11:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:11:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:11:28,981 INFO L87 Difference]: Start difference. First operand 309 states and 319 transitions. Second operand has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:35,816 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2022-01-31 17:11:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:11:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:11:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:35,817 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:11:35,817 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:11:35,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:11:35,820 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:35,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 35 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:11:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-01-31 17:11:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.0360655737704918) internal successors, (316), 305 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 321 transitions. [2022-01-31 17:11:35,948 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 321 transitions. Word has length 295 [2022-01-31 17:11:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:35,948 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 321 transitions. [2022-01-31 17:11:35,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 321 transitions. [2022-01-31 17:11:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:11:35,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:35,949 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:35,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:11:35,949 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1531837509, now seen corresponding path program 136 times [2022-01-31 17:11:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622468053] [2022-01-31 17:11:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:35,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:35,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:35,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:35,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:41,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622468053] [2022-01-31 17:11:41,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622468053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:41,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:41,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:11:41,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511902304] [2022-01-31 17:11:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:41,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:11:41,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:11:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:11:41,830 INFO L87 Difference]: Start difference. First operand 311 states and 321 transitions. Second operand has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:48,831 INFO L93 Difference]: Finished difference Result 348 states and 368 transitions. [2022-01-31 17:11:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:11:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 17:11:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:48,832 INFO L225 Difference]: With dead ends: 348 [2022-01-31 17:11:48,832 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:11:48,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:11:48,835 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 296 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:48,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 65 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:11:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-01-31 17:11:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.0358306188925082) internal successors, (318), 307 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-01-31 17:11:48,965 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 297 [2022-01-31 17:11:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:48,965 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-01-31 17:11:48,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-01-31 17:11:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:11:48,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:48,966 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:48,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:11:48,966 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash -192797991, now seen corresponding path program 137 times [2022-01-31 17:11:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516298168] [2022-01-31 17:11:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:48,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:48,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:48,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:48,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:54,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516298168] [2022-01-31 17:11:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516298168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:54,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:54,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:11:54,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764509785] [2022-01-31 17:11:54,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:54,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:11:54,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:11:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:11:54,888 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:01,973 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2022-01-31 17:12:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:12:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:12:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:01,974 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:12:01,974 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 17:12:01,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:12:01,976 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 298 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:01,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 60 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:12:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 17:12:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-01-31 17:12:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.035598705501618) internal successors, (320), 309 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 325 transitions. [2022-01-31 17:12:02,101 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 325 transitions. Word has length 299 [2022-01-31 17:12:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:02,101 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 325 transitions. [2022-01-31 17:12:02,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 325 transitions. [2022-01-31 17:12:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:12:02,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:02,102 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:12:02,102 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1866009993, now seen corresponding path program 138 times [2022-01-31 17:12:02,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:02,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115101783] [2022-01-31 17:12:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:02,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:02,104 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:02,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:02,114 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:08,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115101783] [2022-01-31 17:12:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115101783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:08,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:08,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:12:08,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227848809] [2022-01-31 17:12:08,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:08,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:12:08,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:12:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:12:08,058 INFO L87 Difference]: Start difference. First operand 315 states and 325 transitions. Second operand has 141 states, 141 states have (on average 2.0638297872340425) internal successors, (291), 140 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)