/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/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:10,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:10,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:10,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:01:10,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:10,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:10,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:10,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:10,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:10,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:10,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:10,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:10,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:10,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:10,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:10,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:10,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:01:10,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:10,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:10,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:10,738 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 17:01:10,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:10,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:10,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:10,747 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:10,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:10,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:10,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:10,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:10,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:10,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:10,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:10,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:10,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:10,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:10,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:10,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:10,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:10,750 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:10,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:10,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:10,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:10,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:10,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:10,987 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:10,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2022-01-31 17:01:11,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7112439e/79b06e6853134673bd27e2a79995c7d9/FLAGf03013ff0 [2022-01-31 17:01:11,418 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:11,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2022-01-31 17:01:11,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7112439e/79b06e6853134673bd27e2a79995c7d9/FLAGf03013ff0 [2022-01-31 17:01:11,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7112439e/79b06e6853134673bd27e2a79995c7d9 [2022-01-31 17:01:11,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:11,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:11,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:11,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:11,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28142a26 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 17:01:11,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:11,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:11,994 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/sanfoundry_02_ground.i[813,826] [2022-01-31 17:01:12,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:12,028 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:12,036 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/sanfoundry_02_ground.i[813,826] [2022-01-31 17:01:12,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:12,057 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:12,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12 WrapperNode [2022-01-31 17:01:12,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:12,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:12,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:12,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:12,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:12,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:12,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:12,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:12,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:12,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:12,124 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 17:01:12,147 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 17:01:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:12,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:12,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:12,163 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:12,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:12,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:12,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:12,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:12,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:12,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:12,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:12,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:12,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:12,225 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:12,227 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:12,447 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:12,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:12,453 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 17:01:12,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:12 BoogieIcfgContainer [2022-01-31 17:01:12,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:12,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:12,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:12,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:12,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:11" (1/3) ... [2022-01-31 17:01:12,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1290a9 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 17:01:12,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (2/3) ... [2022-01-31 17:01:12,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1290a9 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 17:01:12,461 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 17:01:12,462 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2022-01-31 17:01:12,466 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:12,467 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:12,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:12,523 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 17:01:12,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:01:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 17:01:12,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash -295877419, now seen corresponding path program 1 times [2022-01-31 17:01:12,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570594052] [2022-01-31 17:01:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,638 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570594052] [2022-01-31 17:01:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570594052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:01:12,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017708576] [2022-01-31 17:01:12,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:01:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:01:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:01:12,854 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,920 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2022-01-31 17:01:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:01:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 17:01:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,932 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:01:12,932 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:01:12,935 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 17:01:12,939 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:01:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 17:01:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-01-31 17:01:12,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2022-01-31 17:01:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,981 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-01-31 17:01:12,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-01-31 17:01:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 17:01:12,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:12,985 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 580739135, now seen corresponding path program 1 times [2022-01-31 17:01:12,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198105914] [2022-01-31 17:01:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198105914] [2022-01-31 17:01:13,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [198105914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:13,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620733418] [2022-01-31 17:01:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:13,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:13,073 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,176 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-01-31 17:01:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 17:01:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,178 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:01:13,178 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:01:13,179 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 17:01:13,180 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:01:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 17:01:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-01-31 17:01:13,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2022-01-31 17:01:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,193 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-01-31 17:01:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-01-31 17:01:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:01:13,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:13,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1383088797, now seen corresponding path program 1 times [2022-01-31 17:01:13,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469634204] [2022-01-31 17:01:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,323 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 17:01:13,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469634204] [2022-01-31 17:01:13,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [469634204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693821746] [2022-01-31 17:01:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,326 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,467 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-01-31 17:01:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:01:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,485 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:01:13,485 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 17:01:13,485 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 17:01:13,486 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 48 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 17:01:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 17:01:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-01-31 17:01:13,493 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 19 [2022-01-31 17:01:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,494 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-01-31 17:01:13,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-01-31 17:01:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 17:01:13,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:13,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash -652999301, now seen corresponding path program 2 times [2022-01-31 17:01:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013475536] [2022-01-31 17:01:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,592 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 17:01:13,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013475536] [2022-01-31 17:01:13,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013475536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:13,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529196431] [2022-01-31 17:01:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:13,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:13,594 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,659 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-01-31 17:01:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 17:01:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,660 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:01:13,660 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 17:01:13,661 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 17:01:13,662 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 17:01:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-31 17:01:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-01-31 17:01:13,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 21 [2022-01-31 17:01:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,670 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-01-31 17:01:13,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-01-31 17:01:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:01:13,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,671 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] [2022-01-31 17:01:13,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:13,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1980875942, now seen corresponding path program 1 times [2022-01-31 17:01:13,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868413603] [2022-01-31 17:01:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,748 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 17:01:13,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868413603] [2022-01-31 17:01:13,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [868413603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334768880] [2022-01-31 17:01:13,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,750 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,835 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-01-31 17:01:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 17:01:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,837 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:01:13,837 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:01:13,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,838 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:01:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 17:01:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-31 17:01:13,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2022-01-31 17:01:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-31 17:01:13,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-31 17:01:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:01:13,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,851 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] [2022-01-31 17:01:13,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:13,852 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 189875483, now seen corresponding path program 2 times [2022-01-31 17:01:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278903312] [2022-01-31 17:01:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278903312] [2022-01-31 17:01:13,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278903312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437206404] [2022-01-31 17:01:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,959 INFO L87 Difference]: Start difference. First operand 40 states and 50 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 17:01:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,087 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2022-01-31 17:01:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:14,087 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 27 [2022-01-31 17:01:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,088 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:01:14,088 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:01:14,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,090 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 43 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:01:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-01-31 17:01:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-01-31 17:01:14,100 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 27 [2022-01-31 17:01:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,100 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-01-31 17:01:14,101 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 17:01:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-01-31 17:01:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 17:01:14,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,102 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] [2022-01-31 17:01:14,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:14,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -276998214, now seen corresponding path program 3 times [2022-01-31 17:01:14,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939020432] [2022-01-31 17:01:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,154 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 17:01:14,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939020432] [2022-01-31 17:01:14,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939020432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:14,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259966980] [2022-01-31 17:01:14,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:14,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:14,171 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,260 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2022-01-31 17:01:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 17:01:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,261 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:01:14,261 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 17:01:14,262 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 17:01:14,263 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 17:01:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 17:01:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-01-31 17:01:14,285 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 30 [2022-01-31 17:01:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,285 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-01-31 17:01:14,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-01-31 17:01:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:01:14,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,286 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] [2022-01-31 17:01:14,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:14,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623196, now seen corresponding path program 4 times [2022-01-31 17:01:14,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611540317] [2022-01-31 17:01:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,353 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 17:01:14,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611540317] [2022-01-31 17:01:14,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611540317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:14,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099476264] [2022-01-31 17:01:14,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:14,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:14,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:14,357 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 17:01:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,469 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2022-01-31 17:01:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 32 [2022-01-31 17:01:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,470 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:01:14,471 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:01:14,471 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 17:01:14,472 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:01:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 17:01:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-31 17:01:14,485 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 32 [2022-01-31 17:01:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,487 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-31 17:01:14,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 17:01:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-31 17:01:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 17:01:14,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,491 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] [2022-01-31 17:01:14,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:14,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash -877259778, now seen corresponding path program 5 times [2022-01-31 17:01:14,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212865889] [2022-01-31 17:01:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,602 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 17:01:14,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212865889] [2022-01-31 17:01:14,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212865889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:14,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646186604] [2022-01-31 17:01:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:14,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:14,606 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,731 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2022-01-31 17:01:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 17:01:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,733 INFO L225 Difference]: With dead ends: 87 [2022-01-31 17:01:14,733 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:01:14,736 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 17:01:14,737 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 43 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:01:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-01-31 17:01:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-01-31 17:01:14,745 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2022-01-31 17:01:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,745 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-01-31 17:01:14,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-01-31 17:01:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 17:01:14,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,746 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] [2022-01-31 17:01:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:14,746 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash -246122144, now seen corresponding path program 6 times [2022-01-31 17:01:14,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602272462] [2022-01-31 17:01:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602272462] [2022-01-31 17:01:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602272462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:14,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101142226] [2022-01-31 17:01:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,814 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,949 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2022-01-31 17:01:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 17:01:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,950 INFO L225 Difference]: With dead ends: 93 [2022-01-31 17:01:14,950 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:01:14,951 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 17:01:14,951 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 93 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 48 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:01:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-01-31 17:01:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-01-31 17:01:14,960 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 36 [2022-01-31 17:01:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,960 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-01-31 17:01:14,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-01-31 17:01:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:14,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,961 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:14,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1815128371, now seen corresponding path program 7 times [2022-01-31 17:01:14,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55571460] [2022-01-31 17:01:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,045 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 17:01:15,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55571460] [2022-01-31 17:01:15,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [55571460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:15,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032137661] [2022-01-31 17:01:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:15,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:15,047 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,225 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2022-01-31 17:01:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 17:01:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,226 INFO L225 Difference]: With dead ends: 103 [2022-01-31 17:01:15,227 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:01:15,227 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 17:01:15,232 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 48 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:01:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-01-31 17:01:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.290909090909091) internal successors, (71), 55 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-01-31 17:01:15,244 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 41 [2022-01-31 17:01:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,244 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-01-31 17:01:15,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-01-31 17:01:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:01:15,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,246 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:15,246 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1913720956, now seen corresponding path program 8 times [2022-01-31 17:01:15,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793580341] [2022-01-31 17:01:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,250 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,342 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 17:01:15,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793580341] [2022-01-31 17:01:15,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [793580341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:15,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344364973] [2022-01-31 17:01:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:15,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:15,344 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,587 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-01-31 17:01:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 17:01:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,588 INFO L225 Difference]: With dead ends: 113 [2022-01-31 17:01:15,588 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:01:15,588 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 17:01:15,589 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 48 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:01:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-01-31 17:01:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-01-31 17:01:15,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 46 [2022-01-31 17:01:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,597 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-01-31 17:01:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-01-31 17:01:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:15,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,598 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:15,598 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,599 INFO L85 PathProgramCache]: Analyzing trace with hash -365358321, now seen corresponding path program 9 times [2022-01-31 17:01:15,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446251552] [2022-01-31 17:01:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446251552] [2022-01-31 17:01:15,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446251552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:15,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322838622] [2022-01-31 17:01:15,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:15,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:15,717 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,936 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2022-01-31 17:01:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:01:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,937 INFO L225 Difference]: With dead ends: 123 [2022-01-31 17:01:15,937 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:01:15,938 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 17:01:15,938 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 48 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:01:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2022-01-31 17:01:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-01-31 17:01:15,948 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 51 [2022-01-31 17:01:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,948 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-01-31 17:01:15,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-01-31 17:01:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 17:01:15,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,949 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:15,949 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,949 INFO L85 PathProgramCache]: Analyzing trace with hash 115160488, now seen corresponding path program 10 times [2022-01-31 17:01:15,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067160474] [2022-01-31 17:01:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,056 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 17:01:16,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067160474] [2022-01-31 17:01:16,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067160474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:16,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795597454] [2022-01-31 17:01:16,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:16,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:16,058 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,285 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2022-01-31 17:01:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:16,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 17:01:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,286 INFO L225 Difference]: With dead ends: 133 [2022-01-31 17:01:16,286 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:01:16,287 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 17:01:16,287 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 186 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 43 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:01:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-01-31 17:01:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-01-31 17:01:16,296 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 56 [2022-01-31 17:01:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,297 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-01-31 17:01:16,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-01-31 17:01:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:01:16,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,298 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:16,298 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash -326464277, now seen corresponding path program 11 times [2022-01-31 17:01:16,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675748289] [2022-01-31 17:01:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,418 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 17:01:16,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675748289] [2022-01-31 17:01:16,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [675748289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:01:16,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216124304] [2022-01-31 17:01:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:01:16,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:01:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:16,421 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,670 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2022-01-31 17:01:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 17:01:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,672 INFO L225 Difference]: With dead ends: 143 [2022-01-31 17:01:16,672 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:01:16,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:16,674 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 58 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:01:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-01-31 17:01:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-01-31 17:01:16,685 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 61 [2022-01-31 17:01:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,686 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-01-31 17:01:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-01-31 17:01:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 17:01:16,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,687 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:16,688 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1300597708, now seen corresponding path program 12 times [2022-01-31 17:01:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60965984] [2022-01-31 17:01:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60965984] [2022-01-31 17:01:16,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60965984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:16,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821779881] [2022-01-31 17:01:16,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:16,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:16,853 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,123 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2022-01-31 17:01:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 17:01:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,125 INFO L225 Difference]: With dead ends: 153 [2022-01-31 17:01:17,125 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:01:17,125 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 17:01:17,126 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 195 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 58 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:01:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-01-31 17:01:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 85 states have internal predecessors, (111), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2022-01-31 17:01:17,140 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 66 [2022-01-31 17:01:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,140 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2022-01-31 17:01:17,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2022-01-31 17:01:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:01:17,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,141 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:17,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 671012551, now seen corresponding path program 13 times [2022-01-31 17:01:17,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189446629] [2022-01-31 17:01:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,145 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,297 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 17:01:17,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189446629] [2022-01-31 17:01:17,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189446629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:17,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071120744] [2022-01-31 17:01:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:17,299 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,641 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2022-01-31 17:01:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:01:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,643 INFO L225 Difference]: With dead ends: 163 [2022-01-31 17:01:17,643 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:01:17,644 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 17:01:17,644 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 63 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:01:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-01-31 17:01:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 91 states have internal predecessors, (119), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-01-31 17:01:17,655 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 71 [2022-01-31 17:01:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-01-31 17:01:17,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-01-31 17:01:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:01:17,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,656 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:17,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash -271699472, now seen corresponding path program 14 times [2022-01-31 17:01:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486660679] [2022-01-31 17:01:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,819 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 17:01:17,819 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486660679] [2022-01-31 17:01:17,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [486660679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:17,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790880038] [2022-01-31 17:01:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:17,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:17,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:17,820 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,196 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2022-01-31 17:01:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:01:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 17:01:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,197 INFO L225 Difference]: With dead ends: 173 [2022-01-31 17:01:18,197 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:01:18,197 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 17:01:18,198 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 249 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 58 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:01:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-01-31 17:01:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.309278350515464) internal successors, (127), 97 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2022-01-31 17:01:18,210 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 76 [2022-01-31 17:01:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,210 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2022-01-31 17:01:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2022-01-31 17:01:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:01:18,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,211 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:18,211 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -487608157, now seen corresponding path program 15 times [2022-01-31 17:01:18,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189512353] [2022-01-31 17:01:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,397 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 17:01:18,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189512353] [2022-01-31 17:01:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189512353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:18,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170282300] [2022-01-31 17:01:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:18,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:18,399 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,767 INFO L93 Difference]: Finished difference Result 183 states and 248 transitions. [2022-01-31 17:01:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 17:01:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,772 INFO L225 Difference]: With dead ends: 183 [2022-01-31 17:01:18,773 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:01:18,773 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 17:01:18,774 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 261 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 53 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:01:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2022-01-31 17:01:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 103 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2022-01-31 17:01:18,788 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 81 [2022-01-31 17:01:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2022-01-31 17:01:18,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2022-01-31 17:01:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:01:18,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,789 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:18,789 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1138923500, now seen corresponding path program 16 times [2022-01-31 17:01:18,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871160143] [2022-01-31 17:01:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,792 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,963 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 17:01:18,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871160143] [2022-01-31 17:01:18,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871160143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:18,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769736246] [2022-01-31 17:01:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:18,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:18,965 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,402 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-01-31 17:01:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 17:01:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,404 INFO L225 Difference]: With dead ends: 193 [2022-01-31 17:01:19,404 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:01:19,405 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 17:01:19,405 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 58 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:01:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-01-31 17:01:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 109 states have (on average 1.311926605504587) internal successors, (143), 109 states have internal predecessors, (143), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-01-31 17:01:19,425 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 86 [2022-01-31 17:01:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,425 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-01-31 17:01:19,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-01-31 17:01:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:01:19,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,426 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:19,427 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1362549375, now seen corresponding path program 17 times [2022-01-31 17:01:19,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905126339] [2022-01-31 17:01:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,621 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 17:01:19,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905126339] [2022-01-31 17:01:19,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905126339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:01:19,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320889004] [2022-01-31 17:01:19,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:01:19,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:01:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:19,624 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,037 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2022-01-31 17:01:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:01:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,039 INFO L225 Difference]: With dead ends: 203 [2022-01-31 17:01:20,039 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:01:20,040 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 17:01:20,041 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 290 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 58 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:01:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2022-01-31 17:01:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 115 states have (on average 1.3130434782608695) internal successors, (151), 115 states have internal predecessors, (151), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2022-01-31 17:01:20,057 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 91 [2022-01-31 17:01:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,057 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2022-01-31 17:01:20,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2022-01-31 17:01:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 17:01:20,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,058 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:20,058 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1700359736, now seen corresponding path program 18 times [2022-01-31 17:01:20,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933256707] [2022-01-31 17:01:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,258 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 17:01:20,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933256707] [2022-01-31 17:01:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933256707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:20,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485709113] [2022-01-31 17:01:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:20,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:20,260 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,736 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2022-01-31 17:01:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:01:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 17:01:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,739 INFO L225 Difference]: With dead ends: 213 [2022-01-31 17:01:20,739 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:01:20,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:20,740 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 332 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 58 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:01:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-01-31 17:01:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 121 states have (on average 1.3140495867768596) internal successors, (159), 121 states have internal predecessors, (159), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2022-01-31 17:01:20,758 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 96 [2022-01-31 17:01:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,759 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2022-01-31 17:01:20,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2022-01-31 17:01:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:01:20,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,760 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:20,760 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -265415589, now seen corresponding path program 19 times [2022-01-31 17:01:20,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472842311] [2022-01-31 17:01:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,983 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 17:01:20,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472842311] [2022-01-31 17:01:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472842311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:01:20,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908636277] [2022-01-31 17:01:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:01:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:01:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:20,986 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,461 INFO L93 Difference]: Finished difference Result 223 states and 304 transitions. [2022-01-31 17:01:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 17:01:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,463 INFO L225 Difference]: With dead ends: 223 [2022-01-31 17:01:21,463 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:01:21,464 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 17:01:21,464 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 379 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 48 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:01:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-01-31 17:01:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 127 states have (on average 1.31496062992126) internal successors, (167), 127 states have internal predecessors, (167), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-01-31 17:01:21,482 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 101 [2022-01-31 17:01:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,483 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-01-31 17:01:21,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-01-31 17:01:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 17:01:21,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,484 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:21,484 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 652772444, now seen corresponding path program 20 times [2022-01-31 17:01:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68849026] [2022-01-31 17:01:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,728 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 17:01:21,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68849026] [2022-01-31 17:01:21,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [68849026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:01:21,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444601330] [2022-01-31 17:01:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:01:21,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:01:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:21,730 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,262 INFO L93 Difference]: Finished difference Result 233 states and 318 transitions. [2022-01-31 17:01:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:01:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 17:01:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,263 INFO L225 Difference]: With dead ends: 233 [2022-01-31 17:01:22,263 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:01:22,264 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 17:01:22,264 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 386 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 48 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:01:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-01-31 17:01:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.3157894736842106) internal successors, (175), 133 states have internal predecessors, (175), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2022-01-31 17:01:22,284 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 106 [2022-01-31 17:01:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,285 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2022-01-31 17:01:22,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2022-01-31 17:01:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:01:22,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,286 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:22,286 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -491839945, now seen corresponding path program 21 times [2022-01-31 17:01:22,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603829763] [2022-01-31 17:01:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,288 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,290 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,555 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 17:01:22,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603829763] [2022-01-31 17:01:22,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603829763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:22,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855316494] [2022-01-31 17:01:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:22,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:22,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:22,557 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,094 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2022-01-31 17:01:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:01:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:01:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,096 INFO L225 Difference]: With dead ends: 243 [2022-01-31 17:01:23,096 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:01:23,097 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 17:01:23,097 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 363 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 53 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:01:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2022-01-31 17:01:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.316546762589928) internal successors, (183), 139 states have internal predecessors, (183), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2022-01-31 17:01:23,122 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 111 [2022-01-31 17:01:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,122 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2022-01-31 17:01:23,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2022-01-31 17:01:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 17:01:23,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,123 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:23,123 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1756424832, now seen corresponding path program 22 times [2022-01-31 17:01:23,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138689277] [2022-01-31 17:01:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:23,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138689277] [2022-01-31 17:01:23,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138689277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:01:23,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049536996] [2022-01-31 17:01:23,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:01:23,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:01:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:23,415 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,958 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2022-01-31 17:01:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:01:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 17:01:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,960 INFO L225 Difference]: With dead ends: 253 [2022-01-31 17:01:23,960 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:01:23,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:23,961 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 53 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:01:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-01-31 17:01:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 145 states have internal predecessors, (191), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2022-01-31 17:01:23,981 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 116 [2022-01-31 17:01:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,981 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2022-01-31 17:01:23,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2022-01-31 17:01:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:01:23,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,982 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:23,982 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1293137939, now seen corresponding path program 23 times [2022-01-31 17:01:23,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232686089] [2022-01-31 17:01:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,278 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 17:01:24,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232686089] [2022-01-31 17:01:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232686089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:01:24,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395763717] [2022-01-31 17:01:24,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:01:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:01:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:24,280 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,908 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2022-01-31 17:01:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 17:01:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,910 INFO L225 Difference]: With dead ends: 263 [2022-01-31 17:01:24,910 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:01:24,911 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 17:01:24,911 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 462 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 48 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:01:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2022-01-31 17:01:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 151 states have (on average 1.3178807947019868) internal successors, (199), 151 states have internal predecessors, (199), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2022-01-31 17:01:24,941 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 121 [2022-01-31 17:01:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2022-01-31 17:01:24,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2022-01-31 17:01:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 17:01:24,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,943 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:24,943 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1662574756, now seen corresponding path program 24 times [2022-01-31 17:01:24,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98345014] [2022-01-31 17:01:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,265 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 17:01:25,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98345014] [2022-01-31 17:01:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [98345014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:01:25,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019518937] [2022-01-31 17:01:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:01:25,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:01:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:25,268 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,904 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2022-01-31 17:01:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:01:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 17:01:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,905 INFO L225 Difference]: With dead ends: 273 [2022-01-31 17:01:25,905 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:01:25,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:25,907 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 484 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 53 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:01:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-01-31 17:01:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 157 states have internal predecessors, (207), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2022-01-31 17:01:25,931 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 126 [2022-01-31 17:01:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,931 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2022-01-31 17:01:25,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2022-01-31 17:01:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:01:25,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,932 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:25,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:25,932 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1321885201, now seen corresponding path program 25 times [2022-01-31 17:01:25,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770358104] [2022-01-31 17:01:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,286 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 17:01:26,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770358104] [2022-01-31 17:01:26,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770358104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:01:26,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263874704] [2022-01-31 17:01:26,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:01:26,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:01:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:26,288 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,968 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2022-01-31 17:01:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:01:26,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have 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 17:01:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,970 INFO L225 Difference]: With dead ends: 283 [2022-01-31 17:01:26,970 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:01:26,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:01:26,972 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 456 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 53 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:01:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-01-31 17:01:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 163 states have (on average 1.3190184049079754) internal successors, (215), 163 states have internal predecessors, (215), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2022-01-31 17:01:27,000 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 131 [2022-01-31 17:01:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:27,000 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2022-01-31 17:01:27,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2022-01-31 17:01:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 17:01:27,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:27,002 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:27,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:27,002 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1022974264, now seen corresponding path program 26 times [2022-01-31 17:01:27,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:27,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145547297] [2022-01-31 17:01:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:27,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:27,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:27,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:27,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:27,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145547297] [2022-01-31 17:01:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145547297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:01:27,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249106898] [2022-01-31 17:01:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:01:27,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:01:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:27,383 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,142 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2022-01-31 17:01:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:01:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 17:01:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,144 INFO L225 Difference]: With dead ends: 293 [2022-01-31 17:01:28,144 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 17:01:28,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:01:28,145 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 63 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 17:01:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2022-01-31 17:01:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 169 states have (on average 1.319526627218935) internal successors, (223), 169 states have internal predecessors, (223), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2022-01-31 17:01:28,184 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 136 [2022-01-31 17:01:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,184 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2022-01-31 17:01:28,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2022-01-31 17:01:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:01:28,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,186 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:28,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:28,187 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1248762827, now seen corresponding path program 27 times [2022-01-31 17:01:28,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333835579] [2022-01-31 17:01:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,579 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 17:01:28,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333835579] [2022-01-31 17:01:28,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [333835579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:28,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:28,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:01:28,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563520134] [2022-01-31 17:01:28,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:28,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:01:28,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:01:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:28,581 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,263 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2022-01-31 17:01:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:29,263 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have 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 17:01:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,264 INFO L225 Difference]: With dead ends: 303 [2022-01-31 17:01:29,264 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 17:01:29,265 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 17:01:29,266 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 655 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 48 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 17:01:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2022-01-31 17:01:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 175 states have (on average 1.32) internal successors, (231), 175 states have internal predecessors, (231), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2022-01-31 17:01:29,296 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 141 [2022-01-31 17:01:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,297 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2022-01-31 17:01:29,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2022-01-31 17:01:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 17:01:29,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,298 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:29,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:29,298 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1306557676, now seen corresponding path program 28 times [2022-01-31 17:01:29,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896292506] [2022-01-31 17:01:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:29,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896292506] [2022-01-31 17:01:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [896292506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:29,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:29,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:01:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105349609] [2022-01-31 17:01:29,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:29,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:01:29,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:01:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:29,698 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:30,421 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2022-01-31 17:01:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 17:01:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:30,423 INFO L225 Difference]: With dead ends: 313 [2022-01-31 17:01:30,423 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:01:30,424 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 17:01:30,425 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 692 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:30,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 53 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:01:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2022-01-31 17:01:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 181 states have (on average 1.3204419889502763) internal successors, (239), 181 states have internal predecessors, (239), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 246 transitions. [2022-01-31 17:01:30,476 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 246 transitions. Word has length 146 [2022-01-31 17:01:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:30,477 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 246 transitions. [2022-01-31 17:01:30,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 246 transitions. [2022-01-31 17:01:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:01:30,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:30,478 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:30,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:30,478 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1771595175, now seen corresponding path program 29 times [2022-01-31 17:01:30,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:30,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138282504] [2022-01-31 17:01:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:30,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:30,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:30,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,889 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 17:01:30,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138282504] [2022-01-31 17:01:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138282504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:01:30,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146000453] [2022-01-31 17:01:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:01:30,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:01:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:30,891 INFO L87 Difference]: Start difference. First operand 188 states and 246 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,657 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2022-01-31 17:01:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:01:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have 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 17:01:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,659 INFO L225 Difference]: With dead ends: 323 [2022-01-31 17:01:31,659 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:01:31,661 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 17:01:31,661 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 649 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 53 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:01:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2022-01-31 17:01:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 187 states have (on average 1.320855614973262) internal successors, (247), 187 states have internal predecessors, (247), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2022-01-31 17:01:31,697 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 151 [2022-01-31 17:01:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,697 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2022-01-31 17:01:31,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2022-01-31 17:01:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 17:01:31,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,699 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:31,699 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2054380784, now seen corresponding path program 30 times [2022-01-31 17:01:31,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522984388] [2022-01-31 17:01:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:32,107 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 17:01:32,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522984388] [2022-01-31 17:01:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [522984388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:32,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:32,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:01:32,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969940097] [2022-01-31 17:01:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:32,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:01:32,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:01:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:32,109 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:32,863 INFO L93 Difference]: Finished difference Result 333 states and 458 transitions. [2022-01-31 17:01:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:01:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 17:01:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:32,867 INFO L225 Difference]: With dead ends: 333 [2022-01-31 17:01:32,867 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 17:01:32,868 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 17:01:32,868 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 671 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:32,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 68 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 17:01:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-01-31 17:01:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.3212435233160622) internal successors, (255), 193 states have internal predecessors, (255), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2022-01-31 17:01:32,905 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 156 [2022-01-31 17:01:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2022-01-31 17:01:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2022-01-31 17:01:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:01:32,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:32,907 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:32,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:32,907 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -787693693, now seen corresponding path program 31 times [2022-01-31 17:01:32,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140785661] [2022-01-31 17:01:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:32,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:32,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:32,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:32,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:33,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140785661] [2022-01-31 17:01:33,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [140785661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:33,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:33,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:01:33,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409457331] [2022-01-31 17:01:33,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:33,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:01:33,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:01:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:33,382 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,171 INFO L93 Difference]: Finished difference Result 343 states and 472 transitions. [2022-01-31 17:01:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:01:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have 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 17:01:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,173 INFO L225 Difference]: With dead ends: 343 [2022-01-31 17:01:34,173 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 17:01:34,174 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 17:01:34,175 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 598 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 58 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 17:01:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2022-01-31 17:01:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.321608040201005) internal successors, (263), 199 states have internal predecessors, (263), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2022-01-31 17:01:34,204 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 161 [2022-01-31 17:01:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2022-01-31 17:01:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2022-01-31 17:01:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 17:01:34,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,205 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:34,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:34,206 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496820, now seen corresponding path program 32 times [2022-01-31 17:01:34,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553512256] [2022-01-31 17:01:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,682 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 17:01:34,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553512256] [2022-01-31 17:01:34,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553512256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:01:34,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553075035] [2022-01-31 17:01:34,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:01:34,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:01:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:34,686 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:35,512 INFO L93 Difference]: Finished difference Result 353 states and 486 transitions. [2022-01-31 17:01:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:01:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 17:01:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:35,513 INFO L225 Difference]: With dead ends: 353 [2022-01-31 17:01:35,513 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:01:35,514 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 17:01:35,515 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 700 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:35,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 53 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:01:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-01-31 17:01:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 205 states have (on average 1.3219512195121952) internal successors, (271), 205 states have internal predecessors, (271), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2022-01-31 17:01:35,557 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 166 [2022-01-31 17:01:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:35,557 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2022-01-31 17:01:35,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2022-01-31 17:01:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:01:35,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:35,558 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:35,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:35,559 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash 279275871, now seen corresponding path program 33 times [2022-01-31 17:01:35,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:35,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325153822] [2022-01-31 17:01:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:35,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:35,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:35,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:35,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,020 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 17:01:36,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325153822] [2022-01-31 17:01:36,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [325153822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:36,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:36,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:01:36,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355959999] [2022-01-31 17:01:36,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:36,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:01:36,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:01:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:36,022 INFO L87 Difference]: Start difference. First operand 212 states and 278 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:36,836 INFO L93 Difference]: Finished difference Result 363 states and 500 transitions. [2022-01-31 17:01:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:01:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:01:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:36,837 INFO L225 Difference]: With dead ends: 363 [2022-01-31 17:01:36,837 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 17:01:36,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:01:36,839 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 762 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:36,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 58 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 17:01:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2022-01-31 17:01:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 211 states have (on average 1.3222748815165877) internal successors, (279), 211 states have internal predecessors, (279), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 286 transitions. [2022-01-31 17:01:36,889 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 286 transitions. Word has length 171 [2022-01-31 17:01:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:36,889 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 286 transitions. [2022-01-31 17:01:36,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 286 transitions. [2022-01-31 17:01:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 17:01:36,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:36,891 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:36,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:36,891 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1988829352, now seen corresponding path program 34 times [2022-01-31 17:01:36,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:36,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590274743] [2022-01-31 17:01:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:36,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:36,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:36,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:36,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,455 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 17:01:37,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590274743] [2022-01-31 17:01:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [590274743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:37,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:37,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:01:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569694069] [2022-01-31 17:01:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:37,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:01:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:01:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:37,457 INFO L87 Difference]: Start difference. First operand 218 states and 286 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:38,332 INFO L93 Difference]: Finished difference Result 373 states and 514 transitions. [2022-01-31 17:01:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:01:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-01-31 17:01:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:38,333 INFO L225 Difference]: With dead ends: 373 [2022-01-31 17:01:38,333 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 17:01:38,334 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 17:01:38,335 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 654 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:38,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 68 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 17:01:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2022-01-31 17:01:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 217 states have (on average 1.3225806451612903) internal successors, (287), 217 states have internal predecessors, (287), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2022-01-31 17:01:38,377 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 176 [2022-01-31 17:01:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:38,377 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2022-01-31 17:01:38,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2022-01-31 17:01:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:01:38,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:38,379 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:38,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:38,379 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash -507763909, now seen corresponding path program 35 times [2022-01-31 17:01:38,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:38,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375156351] [2022-01-31 17:01:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:38,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:38,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:38,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:38,383 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:38,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375156351] [2022-01-31 17:01:38,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [375156351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:38,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:38,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:01:38,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968031429] [2022-01-31 17:01:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:38,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:01:38,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:01:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:38,997 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:39,924 INFO L93 Difference]: Finished difference Result 383 states and 528 transitions. [2022-01-31 17:01:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:01:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have 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 17:01:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:39,926 INFO L225 Difference]: With dead ends: 383 [2022-01-31 17:01:39,926 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:01:39,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:01:39,927 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 811 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:39,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 53 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:01:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2022-01-31 17:01:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 223 states have (on average 1.3228699551569507) internal successors, (295), 223 states have internal predecessors, (295), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2022-01-31 17:01:39,977 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 181 [2022-01-31 17:01:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:39,978 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2022-01-31 17:01:39,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call 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 L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2022-01-31 17:01:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 17:01:39,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:39,979 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:39,979 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -872581764, now seen corresponding path program 36 times [2022-01-31 17:01:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526777089] [2022-01-31 17:01:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:39,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:39,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:39,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:39,984 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,511 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 17:01:40,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526777089] [2022-01-31 17:01:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526777089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:40,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:01:40,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151787406] [2022-01-31 17:01:40,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:40,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:01:40,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:01:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:40,514 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,474 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2022-01-31 17:01:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:01:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 17:01:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,479 INFO L225 Difference]: With dead ends: 393 [2022-01-31 17:01:41,479 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:01:41,480 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 17:01:41,481 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 753 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 58 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:01:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2022-01-31 17:01:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 229 states have (on average 1.3231441048034935) internal successors, (303), 229 states have internal predecessors, (303), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 310 transitions. [2022-01-31 17:01:41,523 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 310 transitions. Word has length 186 [2022-01-31 17:01:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:41,524 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 310 transitions. [2022-01-31 17:01:41,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 310 transitions. [2022-01-31 17:01:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:01:41,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:41,525 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:41,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:41,525 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:41,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2094355177, now seen corresponding path program 37 times [2022-01-31 17:01:41,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:41,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413351093] [2022-01-31 17:01:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:41,527 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:41,527 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:41,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:41,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,108 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 17:01:42,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413351093] [2022-01-31 17:01:42,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413351093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:01:42,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983038172] [2022-01-31 17:01:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:01:42,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:01:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:42,110 INFO L87 Difference]: Start difference. First operand 236 states and 310 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:43,135 INFO L93 Difference]: Finished difference Result 403 states and 556 transitions. [2022-01-31 17:01:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:01:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have 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 17:01:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:43,136 INFO L225 Difference]: With dead ends: 403 [2022-01-31 17:01:43,136 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 17:01:43,138 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 17:01:43,138 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 700 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:43,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 73 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 17:01:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2022-01-31 17:01:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 235 states have (on average 1.323404255319149) internal successors, (311), 235 states have internal predecessors, (311), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2022-01-31 17:01:43,175 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 318 transitions. Word has length 191 [2022-01-31 17:01:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 318 transitions. [2022-01-31 17:01:43,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 318 transitions. [2022-01-31 17:01:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 17:01:43,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:43,176 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:43,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:01:43,176 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash -269395040, now seen corresponding path program 38 times [2022-01-31 17:01:43,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:43,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852895379] [2022-01-31 17:01:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:43,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:43,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:43,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:43,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:43,846 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 17:01:43,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:43,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852895379] [2022-01-31 17:01:43,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852895379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:43,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:43,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:01:43,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140403847] [2022-01-31 17:01:43,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:43,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:01:43,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:01:43,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:43,848 INFO L87 Difference]: Start difference. First operand 242 states and 318 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:44,874 INFO L93 Difference]: Finished difference Result 413 states and 570 transitions. [2022-01-31 17:01:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:01:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-01-31 17:01:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:44,875 INFO L225 Difference]: With dead ends: 413 [2022-01-31 17:01:44,875 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 17:01:44,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:01:44,877 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 917 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:44,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 53 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 17:01:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-01-31 17:01:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.3236514522821576) internal successors, (319), 241 states have internal predecessors, (319), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 326 transitions. [2022-01-31 17:01:44,931 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 326 transitions. Word has length 196 [2022-01-31 17:01:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:44,931 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 326 transitions. [2022-01-31 17:01:44,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 326 transitions. [2022-01-31 17:01:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:01:44,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:44,932 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:44,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:01:44,933 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash 357222131, now seen corresponding path program 39 times [2022-01-31 17:01:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977370435] [2022-01-31 17:01:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:44,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:44,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:44,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:44,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,543 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 17:01:45,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977370435] [2022-01-31 17:01:45,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977370435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:45,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:45,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:01:45,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165991012] [2022-01-31 17:01:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:45,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:01:45,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:01:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:45,545 INFO L87 Difference]: Start difference. First operand 248 states and 326 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,596 INFO L93 Difference]: Finished difference Result 423 states and 584 transitions. [2022-01-31 17:01:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:01:46,597 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have 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 17:01:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,598 INFO L225 Difference]: With dead ends: 423 [2022-01-31 17:01:46,598 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:01:46,599 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 17:01:46,599 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1174 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 43 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:01:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2022-01-31 17:01:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 247 states have (on average 1.3238866396761133) internal successors, (327), 247 states have internal predecessors, (327), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 334 transitions. [2022-01-31 17:01:46,648 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 334 transitions. Word has length 201 [2022-01-31 17:01:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,648 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 334 transitions. [2022-01-31 17:01:46,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 334 transitions. [2022-01-31 17:01:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 17:01:46,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,650 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:46,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:01:46,650 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1044983356, now seen corresponding path program 40 times [2022-01-31 17:01:46,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461760398] [2022-01-31 17:01:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,654 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:47,365 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 17:01:47,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461760398] [2022-01-31 17:01:47,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461760398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:47,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:01:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563246873] [2022-01-31 17:01:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:47,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:01:47,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:01:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:47,367 INFO L87 Difference]: Start difference. First operand 254 states and 334 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:48,472 INFO L93 Difference]: Finished difference Result 433 states and 598 transitions. [2022-01-31 17:01:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:01:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 17:01:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:48,476 INFO L225 Difference]: With dead ends: 433 [2022-01-31 17:01:48,476 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:01:48,477 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 17:01:48,477 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 926 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:48,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 48 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:01:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2022-01-31 17:01:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 253 states have (on average 1.3241106719367588) internal successors, (335), 253 states have internal predecessors, (335), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 342 transitions. [2022-01-31 17:01:48,521 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 342 transitions. Word has length 206 [2022-01-31 17:01:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:48,521 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 342 transitions. [2022-01-31 17:01:48,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 342 transitions. [2022-01-31 17:01:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:01:48,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:48,522 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:48,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:01:48,522 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash -168415025, now seen corresponding path program 41 times [2022-01-31 17:01:48,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:48,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785461759] [2022-01-31 17:01:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:48,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:48,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:48,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:48,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:49,235 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 17:01:49,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785461759] [2022-01-31 17:01:49,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785461759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:49,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:49,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:01:49,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416513802] [2022-01-31 17:01:49,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:49,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:01:49,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:01:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:01:49,237 INFO L87 Difference]: Start difference. First operand 260 states and 342 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:50,389 INFO L93 Difference]: Finished difference Result 443 states and 612 transitions. [2022-01-31 17:01:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:01:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have 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 17:01:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:50,391 INFO L225 Difference]: With dead ends: 443 [2022-01-31 17:01:50,391 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:01:50,393 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 17:01:50,393 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 913 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:50,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 48 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:01:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-01-31 17:01:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 259 states have (on average 1.3243243243243243) internal successors, (343), 259 states have internal predecessors, (343), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 350 transitions. [2022-01-31 17:01:50,446 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 350 transitions. Word has length 211 [2022-01-31 17:01:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:50,447 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 350 transitions. [2022-01-31 17:01:50,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 350 transitions. [2022-01-31 17:01:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 17:01:50,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:50,448 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:50,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:01:50,448 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1573644312, now seen corresponding path program 42 times [2022-01-31 17:01:50,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:50,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472788414] [2022-01-31 17:01:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:50,451 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:50,451 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:50,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:50,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,230 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 17:01:51,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:51,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472788414] [2022-01-31 17:01:51,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472788414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:51,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:51,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:01:51,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570531744] [2022-01-31 17:01:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:51,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:01:51,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:01:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:51,231 INFO L87 Difference]: Start difference. First operand 266 states and 350 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:52,421 INFO L93 Difference]: Finished difference Result 453 states and 626 transitions. [2022-01-31 17:01:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:01:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-01-31 17:01:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:52,422 INFO L225 Difference]: With dead ends: 453 [2022-01-31 17:01:52,422 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 17:01:52,423 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 17:01:52,423 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 900 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:52,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 58 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 17:01:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2022-01-31 17:01:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 265 states have (on average 1.3245283018867924) internal successors, (351), 265 states have internal predecessors, (351), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 358 transitions. [2022-01-31 17:01:52,470 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 358 transitions. Word has length 216 [2022-01-31 17:01:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:52,470 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 358 transitions. [2022-01-31 17:01:52,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 358 transitions. [2022-01-31 17:01:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:01:52,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:52,471 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:52,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:01:52,471 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:52,471 INFO L85 PathProgramCache]: Analyzing trace with hash 478587563, now seen corresponding path program 43 times [2022-01-31 17:01:52,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144137527] [2022-01-31 17:01:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:52,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:52,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:52,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:52,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:53,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:53,259 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 17:01:53,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144137527] [2022-01-31 17:01:53,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144137527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:53,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:53,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:01:53,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449399129] [2022-01-31 17:01:53,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:53,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:01:53,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:01:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:01:53,261 INFO L87 Difference]: Start difference. First operand 272 states and 358 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:54,525 INFO L93 Difference]: Finished difference Result 463 states and 640 transitions. [2022-01-31 17:01:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:01:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have 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 17:01:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:54,526 INFO L225 Difference]: With dead ends: 463 [2022-01-31 17:01:54,526 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:01:54,527 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 17:01:54,527 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1287 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:54,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 48 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:01:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2022-01-31 17:01:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 271 states have (on average 1.3247232472324724) internal successors, (359), 271 states have internal predecessors, (359), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 366 transitions. [2022-01-31 17:01:54,589 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 366 transitions. Word has length 221 [2022-01-31 17:01:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:54,589 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 366 transitions. [2022-01-31 17:01:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 366 transitions. [2022-01-31 17:01:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 17:01:54,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:54,591 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:54,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:01:54,591 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash 718237196, now seen corresponding path program 44 times [2022-01-31 17:01:54,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:54,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308133734] [2022-01-31 17:01:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:54,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:54,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:54,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:54,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:55,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:55,401 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 17:01:55,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308133734] [2022-01-31 17:01:55,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308133734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:55,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:01:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434370305] [2022-01-31 17:01:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:55,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:01:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:01:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:55,402 INFO L87 Difference]: Start difference. First operand 278 states and 366 transitions. Second operand has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:56,714 INFO L93 Difference]: Finished difference Result 473 states and 654 transitions. [2022-01-31 17:01:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:01:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 17:01:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:56,716 INFO L225 Difference]: With dead ends: 473 [2022-01-31 17:01:56,716 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:01:56,717 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 17:01:56,717 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1159 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:56,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 58 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:01:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2022-01-31 17:01:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 277 states have (on average 1.3249097472924187) internal successors, (367), 277 states have internal predecessors, (367), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 374 transitions. [2022-01-31 17:01:56,775 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 374 transitions. Word has length 226 [2022-01-31 17:01:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:56,775 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 374 transitions. [2022-01-31 17:01:56,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 374 transitions. [2022-01-31 17:01:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:01:56,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:56,776 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:56,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:01:56,777 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1976956039, now seen corresponding path program 45 times [2022-01-31 17:01:56,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42355068] [2022-01-31 17:01:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:56,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:56,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:56,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:56,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:57,555 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 17:01:57,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42355068] [2022-01-31 17:01:57,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42355068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:57,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:57,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:01:57,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154651974] [2022-01-31 17:01:57,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:57,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:01:57,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:01:57,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:01:57,557 INFO L87 Difference]: Start difference. First operand 284 states and 374 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:58,893 INFO L93 Difference]: Finished difference Result 483 states and 668 transitions. [2022-01-31 17:01:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:01:58,894 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have 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 17:01:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:58,894 INFO L225 Difference]: With dead ends: 483 [2022-01-31 17:01:58,895 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:01:58,895 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 17:01:58,896 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1091 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:58,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 58 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:01:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 290. [2022-01-31 17:01:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 283 states have (on average 1.325088339222615) internal successors, (375), 283 states have internal predecessors, (375), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:01:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 382 transitions. [2022-01-31 17:01:58,953 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 382 transitions. Word has length 231 [2022-01-31 17:01:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:58,954 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 382 transitions. [2022-01-31 17:01:58,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 382 transitions. [2022-01-31 17:01:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 17:01:58,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:58,961 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:01:58,961 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -781249488, now seen corresponding path program 46 times [2022-01-31 17:01:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:58,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849100991] [2022-01-31 17:01:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:58,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:58,964 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:58,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:58,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,774 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 17:01:59,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:59,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849100991] [2022-01-31 17:01:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [849100991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:59,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:01:59,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079654461] [2022-01-31 17:01:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:01:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:01:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:01:59,776 INFO L87 Difference]: Start difference. First operand 290 states and 382 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:01,175 INFO L93 Difference]: Finished difference Result 493 states and 682 transitions. [2022-01-31 17:02:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:02:01,175 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-01-31 17:02:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:01,176 INFO L225 Difference]: With dead ends: 493 [2022-01-31 17:02:01,176 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 17:02:01,177 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 17:02:01,177 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1153 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:01,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 48 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 17:02:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 296. [2022-01-31 17:02:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 289 states have (on average 1.3252595155709344) internal successors, (383), 289 states have internal predecessors, (383), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 390 transitions. [2022-01-31 17:02:01,246 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 390 transitions. Word has length 236 [2022-01-31 17:02:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 390 transitions. [2022-01-31 17:02:01,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 390 transitions. [2022-01-31 17:02:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:02:01,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:01,248 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:01,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:02:01,248 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1077792355, now seen corresponding path program 47 times [2022-01-31 17:02:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:01,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473465015] [2022-01-31 17:02:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:01,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:01,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:01,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:01,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,164 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 17:02:02,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473465015] [2022-01-31 17:02:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473465015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:02,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:02,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:02:02,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082748076] [2022-01-31 17:02:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:02,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:02:02,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:02:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:02:02,166 INFO L87 Difference]: Start difference. First operand 296 states and 390 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:03,607 INFO L93 Difference]: Finished difference Result 503 states and 696 transitions. [2022-01-31 17:02:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:02:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have 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 17:02:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:03,608 INFO L225 Difference]: With dead ends: 503 [2022-01-31 17:02:03,608 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 17:02:03,609 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 17:02:03,609 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1045 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:03,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 63 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 17:02:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 302. [2022-01-31 17:02:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 295 states have (on average 1.3254237288135593) internal successors, (391), 295 states have internal predecessors, (391), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 398 transitions. [2022-01-31 17:02:03,668 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 398 transitions. Word has length 241 [2022-01-31 17:02:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 398 transitions. [2022-01-31 17:02:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 398 transitions. [2022-01-31 17:02:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 17:02:03,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:03,670 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:03,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:02:03,670 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1938208172, now seen corresponding path program 48 times [2022-01-31 17:02:03,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:03,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973454734] [2022-01-31 17:02:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:03,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:03,673 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:03,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:03,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:04,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:04,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973454734] [2022-01-31 17:02:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973454734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:04,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:04,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:02:04,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866838641] [2022-01-31 17:02:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:04,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:02:04,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:02:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:02:04,555 INFO L87 Difference]: Start difference. First operand 302 states and 398 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:06,028 INFO L93 Difference]: Finished difference Result 513 states and 710 transitions. [2022-01-31 17:02:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:02:06,029 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 17:02:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:06,030 INFO L225 Difference]: With dead ends: 513 [2022-01-31 17:02:06,030 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:02:06,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:02:06,031 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1217 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:06,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 38 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:02:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2022-01-31 17:02:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 301 states have (on average 1.3255813953488371) internal successors, (399), 301 states have internal predecessors, (399), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 406 transitions. [2022-01-31 17:02:06,090 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 406 transitions. Word has length 246 [2022-01-31 17:02:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:06,091 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 406 transitions. [2022-01-31 17:02:06,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 406 transitions. [2022-01-31 17:02:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:02:06,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:06,092 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:06,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:02:06,092 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1738012735, now seen corresponding path program 49 times [2022-01-31 17:02:06,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:06,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070331680] [2022-01-31 17:02:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:06,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:06,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:06,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:06,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:07,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:07,020 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 17:02:07,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070331680] [2022-01-31 17:02:07,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070331680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:07,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:07,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:02:07,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584153556] [2022-01-31 17:02:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:07,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:02:07,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:02:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:02:07,021 INFO L87 Difference]: Start difference. First operand 308 states and 406 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:08,541 INFO L93 Difference]: Finished difference Result 523 states and 724 transitions. [2022-01-31 17:02:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:02:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have 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 17:02:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:08,542 INFO L225 Difference]: With dead ends: 523 [2022-01-31 17:02:08,542 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 17:02:08,543 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 17:02:08,544 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:08,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 58 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 17:02:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2022-01-31 17:02:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 307 states have (on average 1.3257328990228012) internal successors, (407), 307 states have internal predecessors, (407), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 414 transitions. [2022-01-31 17:02:08,620 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 414 transitions. Word has length 251 [2022-01-31 17:02:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:08,620 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 414 transitions. [2022-01-31 17:02:08,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 414 transitions. [2022-01-31 17:02:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 17:02:08,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:08,622 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:02:08,622 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1993625720, now seen corresponding path program 50 times [2022-01-31 17:02:08,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:08,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547262568] [2022-01-31 17:02:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:08,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:08,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:08,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:08,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,572 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 17:02:09,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547262568] [2022-01-31 17:02:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547262568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:09,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:02:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054900825] [2022-01-31 17:02:09,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:09,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:02:09,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:02:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:02:09,575 INFO L87 Difference]: Start difference. First operand 314 states and 414 transitions. Second operand has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:11,198 INFO L93 Difference]: Finished difference Result 533 states and 738 transitions. [2022-01-31 17:02:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:02:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-01-31 17:02:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:11,199 INFO L225 Difference]: With dead ends: 533 [2022-01-31 17:02:11,200 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 17:02:11,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:02:11,201 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1246 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:11,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 53 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 17:02:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 320. [2022-01-31 17:02:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 313 states have (on average 1.3258785942492013) internal successors, (415), 313 states have internal predecessors, (415), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 422 transitions. [2022-01-31 17:02:11,287 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 422 transitions. Word has length 256 [2022-01-31 17:02:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 422 transitions. [2022-01-31 17:02:11,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 422 transitions. [2022-01-31 17:02:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:02:11,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:11,289 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:11,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:02:11,289 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -516017637, now seen corresponding path program 51 times [2022-01-31 17:02:11,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669350308] [2022-01-31 17:02:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:11,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:11,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:11,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:11,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:12,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:12,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669350308] [2022-01-31 17:02:12,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669350308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:12,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:12,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:02:12,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407698011] [2022-01-31 17:02:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:12,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:02:12,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:02:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:02:12,310 INFO L87 Difference]: Start difference. First operand 320 states and 422 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:13,965 INFO L93 Difference]: Finished difference Result 543 states and 752 transitions. [2022-01-31 17:02:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:02:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have 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 17:02:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:13,967 INFO L225 Difference]: With dead ends: 543 [2022-01-31 17:02:13,967 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 17:02:13,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:02:13,968 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1168 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:13,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 68 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 17:02:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 326. [2022-01-31 17:02:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 319 states have (on average 1.3260188087774294) internal successors, (423), 319 states have internal predecessors, (423), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 430 transitions. [2022-01-31 17:02:14,056 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 430 transitions. Word has length 261 [2022-01-31 17:02:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:14,056 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 430 transitions. [2022-01-31 17:02:14,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 430 transitions. [2022-01-31 17:02:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 17:02:14,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:14,057 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:02:14,058 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1944479388, now seen corresponding path program 52 times [2022-01-31 17:02:14,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:14,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182125436] [2022-01-31 17:02:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:14,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:14,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:14,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:14,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:15,090 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 17:02:15,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:15,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182125436] [2022-01-31 17:02:15,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182125436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:15,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:15,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:02:15,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912129320] [2022-01-31 17:02:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:15,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:02:15,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:02:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:02:15,092 INFO L87 Difference]: Start difference. First operand 326 states and 430 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:16,818 INFO L93 Difference]: Finished difference Result 553 states and 766 transitions. [2022-01-31 17:02:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:02:16,818 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-01-31 17:02:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:16,819 INFO L225 Difference]: With dead ends: 553 [2022-01-31 17:02:16,819 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 17:02:16,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:02:16,820 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1660 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:16,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 43 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 17:02:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2022-01-31 17:02:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 325 states have (on average 1.3261538461538462) internal successors, (431), 325 states have internal predecessors, (431), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 438 transitions. [2022-01-31 17:02:16,922 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 438 transitions. Word has length 266 [2022-01-31 17:02:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:16,923 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 438 transitions. [2022-01-31 17:02:16,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 438 transitions. [2022-01-31 17:02:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:02:16,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:16,924 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:16,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:02:16,924 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 134888439, now seen corresponding path program 53 times [2022-01-31 17:02:16,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793284578] [2022-01-31 17:02:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:16,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:16,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:16,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:16,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:18,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:18,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793284578] [2022-01-31 17:02:18,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793284578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:18,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:18,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:02:18,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882619241] [2022-01-31 17:02:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:18,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:02:18,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:18,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:02:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:02:18,042 INFO L87 Difference]: Start difference. First operand 332 states and 438 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:19,773 INFO L93 Difference]: Finished difference Result 563 states and 780 transitions. [2022-01-31 17:02:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:02:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have 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 17:02:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:19,774 INFO L225 Difference]: With dead ends: 563 [2022-01-31 17:02:19,774 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 17:02:19,775 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 17:02:19,775 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1217 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:19,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 58 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 17:02:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2022-01-31 17:02:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 331 states have (on average 1.3262839879154078) internal successors, (439), 331 states have internal predecessors, (439), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 446 transitions. [2022-01-31 17:02:19,849 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 446 transitions. Word has length 271 [2022-01-31 17:02:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:19,849 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 446 transitions. [2022-01-31 17:02:19,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 446 transitions. [2022-01-31 17:02:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 17:02:19,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:19,851 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:19,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:02:19,851 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -745157440, now seen corresponding path program 54 times [2022-01-31 17:02:19,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:19,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407687114] [2022-01-31 17:02:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:19,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:19,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:19,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:19,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,931 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 17:02:20,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407687114] [2022-01-31 17:02:20,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [407687114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:20,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:20,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:02:20,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539758125] [2022-01-31 17:02:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:20,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:02:20,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:02:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:02:20,932 INFO L87 Difference]: Start difference. First operand 338 states and 446 transitions. Second operand has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:22,757 INFO L93 Difference]: Finished difference Result 573 states and 794 transitions. [2022-01-31 17:02:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:02:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2022-01-31 17:02:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:22,758 INFO L225 Difference]: With dead ends: 573 [2022-01-31 17:02:22,758 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 17:02:22,759 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 17:02:22,759 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1274 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1276 Valid, 48 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:02:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 17:02:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2022-01-31 17:02:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 337 states have (on average 1.3264094955489614) internal successors, (447), 337 states have internal predecessors, (447), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 454 transitions. [2022-01-31 17:02:22,848 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 454 transitions. Word has length 276 [2022-01-31 17:02:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 454 transitions. [2022-01-31 17:02:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 454 transitions. [2022-01-31 17:02:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:02:22,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:22,850 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:22,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:02:22,850 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash -128592429, now seen corresponding path program 55 times [2022-01-31 17:02:22,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408192510] [2022-01-31 17:02:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:22,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:22,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:22,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:22,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:23,971 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 17:02:23,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408192510] [2022-01-31 17:02:23,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408192510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:23,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:23,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:02:23,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241850960] [2022-01-31 17:02:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:23,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:02:23,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:02:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:02:23,974 INFO L87 Difference]: Start difference. First operand 344 states and 454 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:25,877 INFO L93 Difference]: Finished difference Result 583 states and 808 transitions. [2022-01-31 17:02:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:02:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have 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 17:02:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:25,878 INFO L225 Difference]: With dead ends: 583 [2022-01-31 17:02:25,878 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 17:02:25,879 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 17:02:25,879 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1216 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:25,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 68 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 17:02:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2022-01-31 17:02:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 343 states have (on average 1.3265306122448979) internal successors, (455), 343 states have internal predecessors, (455), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 462 transitions. [2022-01-31 17:02:25,972 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 462 transitions. Word has length 281 [2022-01-31 17:02:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:25,972 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 462 transitions. [2022-01-31 17:02:25,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 462 transitions. [2022-01-31 17:02:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 17:02:25,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:25,974 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:25,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:02:25,974 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -163003676, now seen corresponding path program 56 times [2022-01-31 17:02:25,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:25,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910692494] [2022-01-31 17:02:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:25,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:25,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:25,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:25,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:27,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910692494] [2022-01-31 17:02:27,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910692494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:27,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:27,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:02:27,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206564348] [2022-01-31 17:02:27,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:02:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:02:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:02:27,173 INFO L87 Difference]: Start difference. First operand 350 states and 462 transitions. Second operand has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:29,089 INFO L93 Difference]: Finished difference Result 593 states and 822 transitions. [2022-01-31 17:02:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:02:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 17:02:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:29,090 INFO L225 Difference]: With dead ends: 593 [2022-01-31 17:02:29,091 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 17:02:29,092 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 17:02:29,092 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1598 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:29,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 43 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 17:02:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2022-01-31 17:02:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 349 states have (on average 1.326647564469914) internal successors, (463), 349 states have internal predecessors, (463), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 470 transitions. [2022-01-31 17:02:29,175 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 470 transitions. Word has length 286 [2022-01-31 17:02:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:29,175 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 470 transitions. [2022-01-31 17:02:29,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 470 transitions. [2022-01-31 17:02:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:02:29,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:29,177 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:29,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:02:29,177 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:29,178 INFO L85 PathProgramCache]: Analyzing trace with hash -335888465, now seen corresponding path program 57 times [2022-01-31 17:02:29,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:29,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346635961] [2022-01-31 17:02:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:29,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:29,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:29,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:29,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,352 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 17:02:30,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:30,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346635961] [2022-01-31 17:02:30,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [346635961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:30,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:30,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:02:30,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018819164] [2022-01-31 17:02:30,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:30,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:02:30,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:02:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:02:30,354 INFO L87 Difference]: Start difference. First operand 356 states and 470 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:32,317 INFO L93 Difference]: Finished difference Result 603 states and 836 transitions. [2022-01-31 17:02:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:02:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have 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 17:02:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:32,319 INFO L225 Difference]: With dead ends: 603 [2022-01-31 17:02:32,319 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 17:02:32,324 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 17:02:32,325 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1430 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:32,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 53 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 17:02:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2022-01-31 17:02:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 355 states have (on average 1.3267605633802817) internal successors, (471), 355 states have internal predecessors, (471), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 478 transitions. [2022-01-31 17:02:32,406 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 478 transitions. Word has length 291 [2022-01-31 17:02:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 478 transitions. [2022-01-31 17:02:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 478 transitions. [2022-01-31 17:02:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 17:02:32,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:32,407 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:32,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:02:32,408 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash -253392632, now seen corresponding path program 58 times [2022-01-31 17:02:32,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49631945] [2022-01-31 17:02:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:32,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:32,409 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:32,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:32,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:33,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49631945] [2022-01-31 17:02:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [49631945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:33,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:33,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:02:33,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244729503] [2022-01-31 17:02:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:33,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:02:33,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:02:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:02:33,639 INFO L87 Difference]: Start difference. First operand 362 states and 478 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:35,688 INFO L93 Difference]: Finished difference Result 613 states and 850 transitions. [2022-01-31 17:02:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:02:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-01-31 17:02:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:35,689 INFO L225 Difference]: With dead ends: 613 [2022-01-31 17:02:35,689 INFO L226 Difference]: Without dead ends: 372 [2022-01-31 17:02:35,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:02:35,691 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1317 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:35,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 58 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-31 17:02:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 368. [2022-01-31 17:02:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 361 states have (on average 1.3268698060941828) internal successors, (479), 361 states have internal predecessors, (479), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 486 transitions. [2022-01-31 17:02:35,792 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 486 transitions. Word has length 296 [2022-01-31 17:02:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:35,793 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 486 transitions. [2022-01-31 17:02:35,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 486 transitions. [2022-01-31 17:02:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:02:35,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:35,794 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:35,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:02:35,795 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1772963445, now seen corresponding path program 59 times [2022-01-31 17:02:35,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:35,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792121010] [2022-01-31 17:02:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:35,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:35,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:35,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:35,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:37,045 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 17:02:37,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792121010] [2022-01-31 17:02:37,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792121010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:37,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:37,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:02:37,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782710256] [2022-01-31 17:02:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:02:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:02:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:02:37,047 INFO L87 Difference]: Start difference. First operand 368 states and 486 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:39,166 INFO L93 Difference]: Finished difference Result 623 states and 864 transitions. [2022-01-31 17:02:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:02:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-01-31 17:02:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:39,168 INFO L225 Difference]: With dead ends: 623 [2022-01-31 17:02:39,168 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 17:02:39,169 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 17:02:39,169 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1379 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:39,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 58 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 17:02:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2022-01-31 17:02:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 367 states have (on average 1.326975476839237) internal successors, (487), 367 states have internal predecessors, (487), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 494 transitions. [2022-01-31 17:02:39,257 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 494 transitions. Word has length 301 [2022-01-31 17:02:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:39,257 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 494 transitions. [2022-01-31 17:02:39,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 494 transitions. [2022-01-31 17:02:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 17:02:39,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:39,258 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:39,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:02:39,259 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash 819093292, now seen corresponding path program 60 times [2022-01-31 17:02:39,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:39,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071313019] [2022-01-31 17:02:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:39,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:39,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:39,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:39,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:40,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:40,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071313019] [2022-01-31 17:02:40,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071313019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:40,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:40,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:02:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355387048] [2022-01-31 17:02:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:02:40,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:02:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:02:40,547 INFO L87 Difference]: Start difference. First operand 374 states and 494 transitions. Second operand has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:42,709 INFO L93 Difference]: Finished difference Result 633 states and 878 transitions. [2022-01-31 17:02:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:02:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-01-31 17:02:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:42,711 INFO L225 Difference]: With dead ends: 633 [2022-01-31 17:02:42,711 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:02:42,712 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 17:02:42,712 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1571 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:42,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 48 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:02:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 380. [2022-01-31 17:02:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 373 states have (on average 1.3270777479892761) internal successors, (495), 373 states have internal predecessors, (495), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 502 transitions. [2022-01-31 17:02:42,823 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 502 transitions. Word has length 306 [2022-01-31 17:02:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 502 transitions. [2022-01-31 17:02:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 502 transitions. [2022-01-31 17:02:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:02:42,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:42,825 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:42,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:02:42,825 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2143845529, now seen corresponding path program 61 times [2022-01-31 17:02:42,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:42,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534202011] [2022-01-31 17:02:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:42,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:42,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:42,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:42,831 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,152 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 17:02:44,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534202011] [2022-01-31 17:02:44,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534202011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:44,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:44,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:02:44,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143674988] [2022-01-31 17:02:44,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:44,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:02:44,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:02:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:02:44,154 INFO L87 Difference]: Start difference. First operand 380 states and 502 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:46,627 INFO L93 Difference]: Finished difference Result 643 states and 892 transitions. [2022-01-31 17:02:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:02:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:02:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:46,628 INFO L225 Difference]: With dead ends: 643 [2022-01-31 17:02:46,628 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 17:02:46,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:02:46,629 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1373 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:46,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 58 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 17:02:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 386. [2022-01-31 17:02:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 379 states have (on average 1.3271767810026385) internal successors, (503), 379 states have internal predecessors, (503), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 510 transitions. [2022-01-31 17:02:46,767 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 510 transitions. Word has length 311 [2022-01-31 17:02:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:46,768 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 510 transitions. [2022-01-31 17:02:46,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 510 transitions. [2022-01-31 17:02:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-01-31 17:02:46,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:46,769 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:46,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:02:46,770 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash 536184144, now seen corresponding path program 62 times [2022-01-31 17:02:46,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:46,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184309224] [2022-01-31 17:02:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:46,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:46,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:46,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:46,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,161 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 17:02:48,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184309224] [2022-01-31 17:02:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184309224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:48,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:02:48,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56074893] [2022-01-31 17:02:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:48,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:02:48,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:02:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:02:48,163 INFO L87 Difference]: Start difference. First operand 386 states and 510 transitions. Second operand has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:50,467 INFO L93 Difference]: Finished difference Result 653 states and 906 transitions. [2022-01-31 17:02:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:02:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2022-01-31 17:02:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:50,468 INFO L225 Difference]: With dead ends: 653 [2022-01-31 17:02:50,468 INFO L226 Difference]: Without dead ends: 396 [2022-01-31 17:02:50,469 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 17:02:50,470 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1455 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:50,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 53 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-31 17:02:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 392. [2022-01-31 17:02:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 385 states have (on average 1.3272727272727274) internal successors, (511), 385 states have internal predecessors, (511), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 518 transitions. [2022-01-31 17:02:50,609 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 518 transitions. Word has length 316 [2022-01-31 17:02:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:50,609 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 518 transitions. [2022-01-31 17:02:50,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 518 transitions. [2022-01-31 17:02:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 17:02:50,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:50,611 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:50,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:02:50,611 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1677909315, now seen corresponding path program 63 times [2022-01-31 17:02:50,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:50,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786076855] [2022-01-31 17:02:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:50,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:50,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:50,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:50,616 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:52,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:52,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786076855] [2022-01-31 17:02:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786076855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:52,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:02:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590727144] [2022-01-31 17:02:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:02:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:02:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:02:52,011 INFO L87 Difference]: Start difference. First operand 392 states and 518 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:54,388 INFO L93 Difference]: Finished difference Result 663 states and 920 transitions. [2022-01-31 17:02:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:02:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 17:02:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:54,389 INFO L225 Difference]: With dead ends: 663 [2022-01-31 17:02:54,389 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 17:02:54,390 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 17:02:54,390 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1377 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:54,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 58 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 17:02:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 398. [2022-01-31 17:02:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 391 states have (on average 1.3273657289002558) internal successors, (519), 391 states have internal predecessors, (519), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 526 transitions. [2022-01-31 17:02:54,527 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 526 transitions. Word has length 321 [2022-01-31 17:02:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:54,528 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 526 transitions. [2022-01-31 17:02:54,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 526 transitions. [2022-01-31 17:02:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 17:02:54,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:54,529 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:54,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:02:54,529 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -927646860, now seen corresponding path program 64 times [2022-01-31 17:02:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876646610] [2022-01-31 17:02:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:54,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:54,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:54,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:54,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:55,954 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 17:02:55,954 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:55,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876646610] [2022-01-31 17:02:55,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [876646610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:55,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:55,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:02:55,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384093247] [2022-01-31 17:02:55,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:55,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:02:55,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:55,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:02:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:02:55,956 INFO L87 Difference]: Start difference. First operand 398 states and 526 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:58,431 INFO L93 Difference]: Finished difference Result 673 states and 934 transitions. [2022-01-31 17:02:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:02:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 17:02:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:58,433 INFO L225 Difference]: With dead ends: 673 [2022-01-31 17:02:58,433 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:02:58,434 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 17:02:58,434 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1669 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:58,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1671 Valid, 53 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:02:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2022-01-31 17:02:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 397 states have (on average 1.327455919395466) internal successors, (527), 397 states have internal predecessors, (527), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:02:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 534 transitions. [2022-01-31 17:02:58,532 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 534 transitions. Word has length 326 [2022-01-31 17:02:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:58,532 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 534 transitions. [2022-01-31 17:02:58,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 534 transitions. [2022-01-31 17:02:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:02:58,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:58,534 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:58,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:02:58,534 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1987148001, now seen corresponding path program 65 times [2022-01-31 17:02:58,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:58,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573148275] [2022-01-31 17:02:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:58,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:58,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:58,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:58,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,007 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 17:03:00,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:00,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573148275] [2022-01-31 17:03:00,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573148275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:00,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:00,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:03:00,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472193451] [2022-01-31 17:03:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:00,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:03:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:03:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:03:00,008 INFO L87 Difference]: Start difference. First operand 404 states and 534 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:02,527 INFO L93 Difference]: Finished difference Result 683 states and 948 transitions. [2022-01-31 17:03:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:03:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:03:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:02,528 INFO L225 Difference]: With dead ends: 683 [2022-01-31 17:03:02,528 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 17:03:02,529 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 17:03:02,530 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1766 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:02,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1768 Valid, 53 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:03:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 17:03:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 410. [2022-01-31 17:03:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 403 states have (on average 1.3275434243176178) internal successors, (535), 403 states have internal predecessors, (535), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 542 transitions. [2022-01-31 17:03:02,641 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 542 transitions. Word has length 331 [2022-01-31 17:03:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:02,641 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 542 transitions. [2022-01-31 17:03:02,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 542 transitions. [2022-01-31 17:03:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-31 17:03:02,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:02,643 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:02,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:03:02,643 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2046280088, now seen corresponding path program 66 times [2022-01-31 17:03:02,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:02,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127731123] [2022-01-31 17:03:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:02,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:02,645 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:02,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:02,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:04,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:04,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127731123] [2022-01-31 17:03:04,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127731123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:04,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:04,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:03:04,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382379867] [2022-01-31 17:03:04,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:04,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:03:04,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:03:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:03:04,159 INFO L87 Difference]: Start difference. First operand 410 states and 542 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:06,751 INFO L93 Difference]: Finished difference Result 693 states and 962 transitions. [2022-01-31 17:03:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:03:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2022-01-31 17:03:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:06,753 INFO L225 Difference]: With dead ends: 693 [2022-01-31 17:03:06,753 INFO L226 Difference]: Without dead ends: 420 [2022-01-31 17:03:06,755 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 17:03:06,755 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1468 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:06,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 68 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:03:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-31 17:03:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 416. [2022-01-31 17:03:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 409 states have (on average 1.3276283618581908) internal successors, (543), 409 states have internal predecessors, (543), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 550 transitions. [2022-01-31 17:03:06,911 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 550 transitions. Word has length 336 [2022-01-31 17:03:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:06,911 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 550 transitions. [2022-01-31 17:03:06,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 550 transitions. [2022-01-31 17:03:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:03:06,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:06,913 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:06,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:03:06,913 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 573849851, now seen corresponding path program 67 times [2022-01-31 17:03:06,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:06,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990983240] [2022-01-31 17:03:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:06,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:06,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:06,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:06,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:08,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990983240] [2022-01-31 17:03:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990983240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:08,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:08,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:03:08,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525277479] [2022-01-31 17:03:08,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:08,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:03:08,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:03:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:03:08,617 INFO L87 Difference]: Start difference. First operand 416 states and 550 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:11,303 INFO L93 Difference]: Finished difference Result 703 states and 976 transitions. [2022-01-31 17:03:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:03:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 17:03:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:11,305 INFO L225 Difference]: With dead ends: 703 [2022-01-31 17:03:11,306 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 17:03:11,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:03:11,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1760 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:11,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 58 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 17:03:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2022-01-31 17:03:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 415 states have (on average 1.3277108433734939) internal successors, (551), 415 states have internal predecessors, (551), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 558 transitions. [2022-01-31 17:03:11,426 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 558 transitions. Word has length 341 [2022-01-31 17:03:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 558 transitions. [2022-01-31 17:03:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 558 transitions. [2022-01-31 17:03:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 17:03:11,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:11,428 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:11,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:03:11,429 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1797478332, now seen corresponding path program 68 times [2022-01-31 17:03:11,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613431701] [2022-01-31 17:03:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:11,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:11,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:11,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:11,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:13,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613431701] [2022-01-31 17:03:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613431701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:13,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:13,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:03:13,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232379791] [2022-01-31 17:03:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:13,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:03:13,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:03:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:03:13,059 INFO L87 Difference]: Start difference. First operand 422 states and 558 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:15,784 INFO L93 Difference]: Finished difference Result 713 states and 990 transitions. [2022-01-31 17:03:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:03:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-01-31 17:03:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:15,786 INFO L225 Difference]: With dead ends: 713 [2022-01-31 17:03:15,786 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 17:03:15,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:03:15,787 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1842 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:15,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1844 Valid, 58 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 17:03:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2022-01-31 17:03:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 421 states have (on average 1.327790973871734) internal successors, (559), 421 states have internal predecessors, (559), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 566 transitions. [2022-01-31 17:03:15,895 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 566 transitions. Word has length 346 [2022-01-31 17:03:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:15,895 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 566 transitions. [2022-01-31 17:03:15,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 566 transitions. [2022-01-31 17:03:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:03:15,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:15,897 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:15,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:03:15,897 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1530017065, now seen corresponding path program 69 times [2022-01-31 17:03:15,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:15,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692363942] [2022-01-31 17:03:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:15,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:15,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:15,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:15,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:17,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692363942] [2022-01-31 17:03:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [692363942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:17,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:17,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:03:17,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749941968] [2022-01-31 17:03:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:03:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:03:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:03:17,555 INFO L87 Difference]: Start difference. First operand 428 states and 566 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:20,396 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2022-01-31 17:03:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:03:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 17:03:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:20,398 INFO L225 Difference]: With dead ends: 723 [2022-01-31 17:03:20,398 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 17:03:20,399 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 17:03:20,399 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1994 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:20,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 53 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 17:03:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 434. [2022-01-31 17:03:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 427 states have (on average 1.3278688524590163) internal successors, (567), 427 states have internal predecessors, (567), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 574 transitions. [2022-01-31 17:03:20,510 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 574 transitions. Word has length 351 [2022-01-31 17:03:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:20,511 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 574 transitions. [2022-01-31 17:03:20,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 574 transitions. [2022-01-31 17:03:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-01-31 17:03:20,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:20,512 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:20,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:03:20,512 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1612594656, now seen corresponding path program 70 times [2022-01-31 17:03:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:20,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441000882] [2022-01-31 17:03:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:20,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:20,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:20,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:20,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:22,184 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 17:03:22,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:22,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441000882] [2022-01-31 17:03:22,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [441000882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:22,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:22,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:03:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248725087] [2022-01-31 17:03:22,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:03:22,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:03:22,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:03:22,187 INFO L87 Difference]: Start difference. First operand 434 states and 574 transitions. Second operand has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:25,092 INFO L93 Difference]: Finished difference Result 733 states and 1018 transitions. [2022-01-31 17:03:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:03:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-01-31 17:03:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:25,094 INFO L225 Difference]: With dead ends: 733 [2022-01-31 17:03:25,094 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 17:03:25,095 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 17:03:25,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1861 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 58 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 17:03:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 440. [2022-01-31 17:03:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 433 states have (on average 1.327944572748268) internal successors, (575), 433 states have internal predecessors, (575), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 582 transitions. [2022-01-31 17:03:25,220 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 582 transitions. Word has length 356 [2022-01-31 17:03:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:25,220 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 582 transitions. [2022-01-31 17:03:25,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 582 transitions. [2022-01-31 17:03:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 17:03:25,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:25,222 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:25,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:03:25,222 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash 699720883, now seen corresponding path program 71 times [2022-01-31 17:03:25,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:25,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798766047] [2022-01-31 17:03:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:25,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:25,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:25,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,984 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 17:03:26,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:26,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798766047] [2022-01-31 17:03:26,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [798766047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:26,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:26,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:03:26,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115842541] [2022-01-31 17:03:26,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:26,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:03:26,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:03:26,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:03:26,986 INFO L87 Difference]: Start difference. First operand 440 states and 582 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:30,130 INFO L93 Difference]: Finished difference Result 743 states and 1032 transitions. [2022-01-31 17:03:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:03:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 17:03:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:30,132 INFO L225 Difference]: With dead ends: 743 [2022-01-31 17:03:30,132 INFO L226 Difference]: Without dead ends: 450 [2022-01-31 17:03:30,133 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 17:03:30,134 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1528 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:30,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 78 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-31 17:03:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 446. [2022-01-31 17:03:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.328018223234624) internal successors, (583), 439 states have internal predecessors, (583), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 590 transitions. [2022-01-31 17:03:30,251 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 590 transitions. Word has length 361 [2022-01-31 17:03:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:30,251 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 590 transitions. [2022-01-31 17:03:30,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 590 transitions. [2022-01-31 17:03:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 17:03:30,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:30,253 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:30,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:03:30,253 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1297003524, now seen corresponding path program 72 times [2022-01-31 17:03:30,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:30,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337921279] [2022-01-31 17:03:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:30,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:30,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:30,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:30,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,052 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 17:03:32,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337921279] [2022-01-31 17:03:32,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337921279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:32,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:32,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:03:32,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43441994] [2022-01-31 17:03:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:03:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:03:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:03:32,054 INFO L87 Difference]: Start difference. First operand 446 states and 590 transitions. Second operand has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:35,097 INFO L93 Difference]: Finished difference Result 753 states and 1046 transitions. [2022-01-31 17:03:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:03:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 17:03:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:35,098 INFO L225 Difference]: With dead ends: 753 [2022-01-31 17:03:35,098 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 17:03:35,100 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 17:03:35,100 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1555 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:35,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 63 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 17:03:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 452. [2022-01-31 17:03:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 445 states have (on average 1.3280898876404494) internal successors, (591), 445 states have internal predecessors, (591), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 598 transitions. [2022-01-31 17:03:35,233 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 598 transitions. Word has length 366 [2022-01-31 17:03:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:35,233 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 598 transitions. [2022-01-31 17:03:35,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 598 transitions. [2022-01-31 17:03:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:03:35,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:35,234 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:35,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:03:35,235 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -960278897, now seen corresponding path program 73 times [2022-01-31 17:03:35,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232631882] [2022-01-31 17:03:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:35,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:35,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:35,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:35,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:37,048 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 17:03:37,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232631882] [2022-01-31 17:03:37,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232631882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:37,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:37,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:03:37,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588165687] [2022-01-31 17:03:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:37,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:03:37,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:03:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:03:37,049 INFO L87 Difference]: Start difference. First operand 452 states and 598 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:40,228 INFO L93 Difference]: Finished difference Result 763 states and 1060 transitions. [2022-01-31 17:03:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:03:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:03:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:40,229 INFO L225 Difference]: With dead ends: 763 [2022-01-31 17:03:40,229 INFO L226 Difference]: Without dead ends: 462 [2022-01-31 17:03:40,231 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 17:03:40,231 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1547 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:40,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 83 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-31 17:03:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-01-31 17:03:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 451 states have (on average 1.328159645232816) internal successors, (599), 451 states have internal predecessors, (599), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 606 transitions. [2022-01-31 17:03:40,366 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 606 transitions. Word has length 371 [2022-01-31 17:03:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:40,366 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 606 transitions. [2022-01-31 17:03:40,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 606 transitions. [2022-01-31 17:03:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-31 17:03:40,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:40,368 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:40,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:03:40,368 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -73729496, now seen corresponding path program 74 times [2022-01-31 17:03:40,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:40,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663362898] [2022-01-31 17:03:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:40,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:40,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:40,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:40,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:42,215 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 17:03:42,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663362898] [2022-01-31 17:03:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663362898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:42,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:03:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657874658] [2022-01-31 17:03:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:42,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:03:42,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:03:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:03:42,217 INFO L87 Difference]: Start difference. First operand 458 states and 606 transitions. Second operand has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:45,427 INFO L93 Difference]: Finished difference Result 773 states and 1074 transitions. [2022-01-31 17:03:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:03:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 376 [2022-01-31 17:03:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:45,429 INFO L225 Difference]: With dead ends: 773 [2022-01-31 17:03:45,429 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 17:03:45,430 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 17:03:45,430 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1819 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:45,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1821 Valid, 63 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 17:03:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 464. [2022-01-31 17:03:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 457 states have (on average 1.3282275711159737) internal successors, (607), 457 states have internal predecessors, (607), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 614 transitions. [2022-01-31 17:03:45,558 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 614 transitions. Word has length 376 [2022-01-31 17:03:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:45,558 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 614 transitions. [2022-01-31 17:03:45,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 614 transitions. [2022-01-31 17:03:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 17:03:45,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:45,560 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:03:45,560 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash -346896277, now seen corresponding path program 75 times [2022-01-31 17:03:45,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160838906] [2022-01-31 17:03:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:45,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:45,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:45,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:45,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:47,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160838906] [2022-01-31 17:03:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [160838906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:47,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:03:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481701980] [2022-01-31 17:03:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:03:47,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:03:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:03:47,456 INFO L87 Difference]: Start difference. First operand 464 states and 614 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:50,768 INFO L93 Difference]: Finished difference Result 783 states and 1088 transitions. [2022-01-31 17:03:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:03:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-01-31 17:03:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:50,770 INFO L225 Difference]: With dead ends: 783 [2022-01-31 17:03:50,770 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 17:03:50,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:03:50,772 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1706 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:50,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 78 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 17:03:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 470. [2022-01-31 17:03:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 463 states have (on average 1.3282937365010798) internal successors, (615), 463 states have internal predecessors, (615), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 622 transitions. [2022-01-31 17:03:50,904 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 622 transitions. Word has length 381 [2022-01-31 17:03:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:50,904 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 622 transitions. [2022-01-31 17:03:50,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 622 transitions. [2022-01-31 17:03:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 17:03:50,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:50,906 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:03:50,906 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1402384308, now seen corresponding path program 76 times [2022-01-31 17:03:50,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545124392] [2022-01-31 17:03:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:50,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:50,908 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:50,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:50,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:52,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:52,846 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 17:03:52,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545124392] [2022-01-31 17:03:52,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545124392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:52,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:52,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:03:52,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134343262] [2022-01-31 17:03:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:52,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:03:52,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:03:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:03:52,849 INFO L87 Difference]: Start difference. First operand 470 states and 622 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:56,241 INFO L93 Difference]: Finished difference Result 793 states and 1102 transitions. [2022-01-31 17:03:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:03:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-01-31 17:03:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:56,243 INFO L225 Difference]: With dead ends: 793 [2022-01-31 17:03:56,243 INFO L226 Difference]: Without dead ends: 480 [2022-01-31 17:03:56,244 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 17:03:56,244 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2018 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:56,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 58 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:03:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-31 17:03:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 476. [2022-01-31 17:03:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 469 states have (on average 1.328358208955224) internal successors, (623), 469 states have internal predecessors, (623), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:03:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 630 transitions. [2022-01-31 17:03:56,388 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 630 transitions. Word has length 386 [2022-01-31 17:03:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:56,388 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 630 transitions. [2022-01-31 17:03:56,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 630 transitions. [2022-01-31 17:03:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 17:03:56,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:56,390 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:56,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:03:56,390 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1136848313, now seen corresponding path program 77 times [2022-01-31 17:03:56,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:56,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309981444] [2022-01-31 17:03:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:56,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:56,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:56,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:56,396 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:58,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:58,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309981444] [2022-01-31 17:03:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309981444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:58,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:58,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:03:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847452354] [2022-01-31 17:03:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:58,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:03:58,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:03:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:03:58,367 INFO L87 Difference]: Start difference. First operand 476 states and 630 transitions. Second operand has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:01,910 INFO L93 Difference]: Finished difference Result 803 states and 1116 transitions. [2022-01-31 17:04:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:04:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 17:04:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:01,911 INFO L225 Difference]: With dead ends: 803 [2022-01-31 17:04:01,912 INFO L226 Difference]: Without dead ends: 486 [2022-01-31 17:04:01,913 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 17:04:01,913 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1750 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:01,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 63 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-31 17:04:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 482. [2022-01-31 17:04:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 475 states have (on average 1.328421052631579) internal successors, (631), 475 states have internal predecessors, (631), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2022-01-31 17:04:02,062 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 391 [2022-01-31 17:04:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:02,062 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2022-01-31 17:04:02,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2022-01-31 17:04:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 17:04:02,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:02,064 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:04:02,064 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1113590160, now seen corresponding path program 78 times [2022-01-31 17:04:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952106244] [2022-01-31 17:04:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:02,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:02,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:02,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:02,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:04,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952106244] [2022-01-31 17:04:04,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952106244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:04,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:04,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:04:04,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144539681] [2022-01-31 17:04:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:04,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:04:04,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:04:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:04:04,175 INFO L87 Difference]: Start difference. First operand 482 states and 638 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:07,718 INFO L93 Difference]: Finished difference Result 813 states and 1130 transitions. [2022-01-31 17:04:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:04:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 396 [2022-01-31 17:04:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:07,720 INFO L225 Difference]: With dead ends: 813 [2022-01-31 17:04:07,720 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 17:04:07,721 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 17:04:07,721 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2307 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:07,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2309 Valid, 43 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 17:04:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 488. [2022-01-31 17:04:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 481 states have (on average 1.3284823284823284) internal successors, (639), 481 states have internal predecessors, (639), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 646 transitions. [2022-01-31 17:04:07,874 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 646 transitions. Word has length 396 [2022-01-31 17:04:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:07,875 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 646 transitions. [2022-01-31 17:04:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 646 transitions. [2022-01-31 17:04:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 17:04:07,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:07,876 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:07,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:04:07,877 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1876683811, now seen corresponding path program 79 times [2022-01-31 17:04:07,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541427269] [2022-01-31 17:04:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:07,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:07,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:07,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:07,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:09,965 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 17:04:09,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541427269] [2022-01-31 17:04:09,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541427269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:09,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:09,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:04:09,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959919736] [2022-01-31 17:04:09,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:09,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:04:09,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:04:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:04:09,967 INFO L87 Difference]: Start difference. First operand 488 states and 646 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:13,610 INFO L93 Difference]: Finished difference Result 823 states and 1144 transitions. [2022-01-31 17:04:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:04:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-01-31 17:04:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:13,612 INFO L225 Difference]: With dead ends: 823 [2022-01-31 17:04:13,612 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 17:04:13,613 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 17:04:13,613 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2014 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:13,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2016 Valid, 58 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 17:04:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 494. [2022-01-31 17:04:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 487 states have (on average 1.3285420944558521) internal successors, (647), 487 states have internal predecessors, (647), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 654 transitions. [2022-01-31 17:04:13,771 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 654 transitions. Word has length 401 [2022-01-31 17:04:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:13,771 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 654 transitions. [2022-01-31 17:04:13,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 654 transitions. [2022-01-31 17:04:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 17:04:13,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:13,773 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:13,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:04:13,773 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1302670484, now seen corresponding path program 80 times [2022-01-31 17:04:13,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695235190] [2022-01-31 17:04:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:13,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:13,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:13,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:13,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:15,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695235190] [2022-01-31 17:04:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [695235190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:15,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:15,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:04:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349621128] [2022-01-31 17:04:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:04:15,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:04:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:04:15,939 INFO L87 Difference]: Start difference. First operand 494 states and 654 transitions. Second operand has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:19,622 INFO L93 Difference]: Finished difference Result 833 states and 1158 transitions. [2022-01-31 17:04:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:04:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 17:04:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:19,624 INFO L225 Difference]: With dead ends: 833 [2022-01-31 17:04:19,624 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 17:04:19,626 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 17:04:19,626 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1921 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:19,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 63 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:04:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 17:04:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 500. [2022-01-31 17:04:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 493 states have (on average 1.328600405679513) internal successors, (655), 493 states have internal predecessors, (655), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 662 transitions. [2022-01-31 17:04:19,783 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 662 transitions. Word has length 406 [2022-01-31 17:04:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:19,783 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 662 transitions. [2022-01-31 17:04:19,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 662 transitions. [2022-01-31 17:04:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:04:19,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:19,785 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:19,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:04:19,785 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1442245121, now seen corresponding path program 81 times [2022-01-31 17:04:19,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165668753] [2022-01-31 17:04:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:19,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:19,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:19,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:19,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,010 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 17:04:22,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165668753] [2022-01-31 17:04:22,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165668753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:22,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:22,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:04:22,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343116748] [2022-01-31 17:04:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:22,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:04:22,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:04:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:04:22,012 INFO L87 Difference]: Start difference. First operand 500 states and 662 transitions. Second operand has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:25,844 INFO L93 Difference]: Finished difference Result 843 states and 1172 transitions. [2022-01-31 17:04:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:04:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:04:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:25,847 INFO L225 Difference]: With dead ends: 843 [2022-01-31 17:04:25,847 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 17:04:25,849 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 17:04:25,850 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1968 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:25,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 68 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 17:04:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 506. [2022-01-31 17:04:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 499 states have (on average 1.3286573146292586) internal successors, (663), 499 states have internal predecessors, (663), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 670 transitions. [2022-01-31 17:04:26,019 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 670 transitions. Word has length 411 [2022-01-31 17:04:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:26,019 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 670 transitions. [2022-01-31 17:04:26,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 670 transitions. [2022-01-31 17:04:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-01-31 17:04:26,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:26,021 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:26,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:04:26,021 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash -547409224, now seen corresponding path program 82 times [2022-01-31 17:04:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65272616] [2022-01-31 17:04:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:26,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:26,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:26,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:26,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:28,275 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 17:04:28,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:28,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65272616] [2022-01-31 17:04:28,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65272616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:28,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:28,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:04:28,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945728563] [2022-01-31 17:04:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:28,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:04:28,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:04:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:04:28,278 INFO L87 Difference]: Start difference. First operand 506 states and 670 transitions. Second operand has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:32,224 INFO L93 Difference]: Finished difference Result 853 states and 1186 transitions. [2022-01-31 17:04:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:04:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 416 [2022-01-31 17:04:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:32,226 INFO L225 Difference]: With dead ends: 853 [2022-01-31 17:04:32,226 INFO L226 Difference]: Without dead ends: 516 [2022-01-31 17:04:32,228 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 17:04:32,228 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2535 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2537 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:32,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2537 Valid, 53 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-31 17:04:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 512. [2022-01-31 17:04:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 505 states have (on average 1.3287128712871288) internal successors, (671), 505 states have internal predecessors, (671), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 678 transitions. [2022-01-31 17:04:32,411 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 678 transitions. Word has length 416 [2022-01-31 17:04:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:32,412 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 678 transitions. [2022-01-31 17:04:32,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 678 transitions. [2022-01-31 17:04:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-01-31 17:04:32,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:32,414 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:32,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:04:32,414 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -669102117, now seen corresponding path program 83 times [2022-01-31 17:04:32,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624220949] [2022-01-31 17:04:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:32,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:32,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:32,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:32,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:34,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:34,739 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 17:04:34,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:34,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624220949] [2022-01-31 17:04:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624220949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:34,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:04:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862158564] [2022-01-31 17:04:34,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:34,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:04:34,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:04:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:04:34,742 INFO L87 Difference]: Start difference. First operand 512 states and 678 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:38,791 INFO L93 Difference]: Finished difference Result 863 states and 1200 transitions. [2022-01-31 17:04:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:04:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 421 [2022-01-31 17:04:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:38,793 INFO L225 Difference]: With dead ends: 863 [2022-01-31 17:04:38,793 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 17:04:38,794 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 17:04:38,795 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2482 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:38,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 53 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 17:04:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 518. [2022-01-31 17:04:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 511 states have (on average 1.3287671232876712) internal successors, (679), 511 states have internal predecessors, (679), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 686 transitions. [2022-01-31 17:04:38,968 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 686 transitions. Word has length 421 [2022-01-31 17:04:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 686 transitions. [2022-01-31 17:04:38,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 686 transitions. [2022-01-31 17:04:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 17:04:38,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:38,970 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:38,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:04:38,970 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -30127908, now seen corresponding path program 84 times [2022-01-31 17:04:38,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393659266] [2022-01-31 17:04:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:38,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:38,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:38,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:38,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,317 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 17:04:41,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393659266] [2022-01-31 17:04:41,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [393659266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:41,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:41,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:04:41,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047997920] [2022-01-31 17:04:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:41,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:04:41,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:04:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:04:41,319 INFO L87 Difference]: Start difference. First operand 518 states and 686 transitions. Second operand has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:45,514 INFO L93 Difference]: Finished difference Result 873 states and 1214 transitions. [2022-01-31 17:04:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:04:45,515 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 426 [2022-01-31 17:04:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:45,516 INFO L225 Difference]: With dead ends: 873 [2022-01-31 17:04:45,516 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 17:04:45,518 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 17:04:45,518 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2339 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:45,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 53 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 17:04:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 524. [2022-01-31 17:04:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 517 states have (on average 1.3288201160541586) internal successors, (687), 517 states have internal predecessors, (687), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-01-31 17:04:45,696 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 426 [2022-01-31 17:04:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:45,696 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-01-31 17:04:45,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-01-31 17:04:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 17:04:45,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:45,698 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:45,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:04:45,698 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1930077769, now seen corresponding path program 85 times [2022-01-31 17:04:45,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603062308] [2022-01-31 17:04:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:45,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:45,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:45,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:45,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:48,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:48,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603062308] [2022-01-31 17:04:48,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603062308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:48,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:48,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:04:48,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927961754] [2022-01-31 17:04:48,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:48,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:04:48,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:04:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:04:48,104 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:52,373 INFO L93 Difference]: Finished difference Result 883 states and 1228 transitions. [2022-01-31 17:04:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:04:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 17:04:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:52,375 INFO L225 Difference]: With dead ends: 883 [2022-01-31 17:04:52,375 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 17:04:52,376 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 17:04:52,376 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:52,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 58 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 17:04:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 530. [2022-01-31 17:04:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 523 states have (on average 1.3288718929254302) internal successors, (695), 523 states have internal predecessors, (695), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 702 transitions. [2022-01-31 17:04:52,546 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 702 transitions. Word has length 431 [2022-01-31 17:04:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:52,546 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 702 transitions. [2022-01-31 17:04:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 702 transitions. [2022-01-31 17:04:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-01-31 17:04:52,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:52,548 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:52,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:04:52,548 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash -502616320, now seen corresponding path program 86 times [2022-01-31 17:04:52,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:52,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555012705] [2022-01-31 17:04:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:52,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:52,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:52,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:52,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:55,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:55,017 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 17:04:55,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:55,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555012705] [2022-01-31 17:04:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [555012705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:55,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:55,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:04:55,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622866854] [2022-01-31 17:04:55,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:55,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:04:55,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:04:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:04:55,020 INFO L87 Difference]: Start difference. First operand 530 states and 702 transitions. Second operand has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:59,422 INFO L93 Difference]: Finished difference Result 893 states and 1242 transitions. [2022-01-31 17:04:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:04:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 436 [2022-01-31 17:04:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:59,423 INFO L225 Difference]: With dead ends: 893 [2022-01-31 17:04:59,423 INFO L226 Difference]: Without dead ends: 540 [2022-01-31 17:04:59,425 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 17:04:59,425 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2198 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:59,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 58 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:04:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-31 17:04:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 536. [2022-01-31 17:04:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 529 states have (on average 1.3289224952741021) internal successors, (703), 529 states have internal predecessors, (703), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:04:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 710 transitions. [2022-01-31 17:04:59,598 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 710 transitions. Word has length 436 [2022-01-31 17:04:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:59,598 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 710 transitions. [2022-01-31 17:04:59,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 710 transitions. [2022-01-31 17:04:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 17:04:59,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:59,601 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:59,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:04:59,601 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash -588778605, now seen corresponding path program 87 times [2022-01-31 17:04:59,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:59,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319914427] [2022-01-31 17:04:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:59,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:59,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:59,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:59,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:02,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319914427] [2022-01-31 17:05:02,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319914427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:02,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:02,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:05:02,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050956331] [2022-01-31 17:05:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:02,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:05:02,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:05:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:05:02,130 INFO L87 Difference]: Start difference. First operand 536 states and 710 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:06,540 INFO L93 Difference]: Finished difference Result 903 states and 1256 transitions. [2022-01-31 17:05:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:05:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 17:05:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:06,542 INFO L225 Difference]: With dead ends: 903 [2022-01-31 17:05:06,542 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 17:05:06,544 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 17:05:06,544 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2095 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:06,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 68 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 17:05:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 542. [2022-01-31 17:05:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 535 states have (on average 1.3289719626168224) internal successors, (711), 535 states have internal predecessors, (711), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 718 transitions. [2022-01-31 17:05:06,722 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 718 transitions. Word has length 441 [2022-01-31 17:05:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 718 transitions. [2022-01-31 17:05:06,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 718 transitions. [2022-01-31 17:05:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 17:05:06,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:06,724 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:06,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:05:06,724 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash 323527972, now seen corresponding path program 88 times [2022-01-31 17:05:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:06,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339104789] [2022-01-31 17:05:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:06,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:06,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:06,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:06,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:09,302 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 17:05:09,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339104789] [2022-01-31 17:05:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339104789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:09,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:09,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:05:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872662273] [2022-01-31 17:05:09,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:09,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:05:09,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:05:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:05:09,305 INFO L87 Difference]: Start difference. First operand 542 states and 718 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:13,871 INFO L93 Difference]: Finished difference Result 913 states and 1270 transitions. [2022-01-31 17:05:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:05:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 17:05:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:13,873 INFO L225 Difference]: With dead ends: 913 [2022-01-31 17:05:13,873 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 17:05:13,874 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 17:05:13,874 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2502 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:13,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2504 Valid, 53 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 17:05:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2022-01-31 17:05:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 541 states have (on average 1.3290203327171903) internal successors, (719), 541 states have internal predecessors, (719), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 726 transitions. [2022-01-31 17:05:14,059 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 726 transitions. Word has length 446 [2022-01-31 17:05:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:14,059 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 726 transitions. [2022-01-31 17:05:14,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 726 transitions. [2022-01-31 17:05:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 17:05:14,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:14,061 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:05:14,061 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1177559697, now seen corresponding path program 89 times [2022-01-31 17:05:14,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83618104] [2022-01-31 17:05:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:14,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:14,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:14,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:14,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:16,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83618104] [2022-01-31 17:05:16,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [83618104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:16,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:16,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:05:16,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261934924] [2022-01-31 17:05:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:05:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:05:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:05:16,706 INFO L87 Difference]: Start difference. First operand 548 states and 726 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:21,321 INFO L93 Difference]: Finished difference Result 923 states and 1284 transitions. [2022-01-31 17:05:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:05:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 17:05:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:21,323 INFO L225 Difference]: With dead ends: 923 [2022-01-31 17:05:21,323 INFO L226 Difference]: Without dead ends: 558 [2022-01-31 17:05:21,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:05:21,325 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2394 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:21,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2396 Valid, 58 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-31 17:05:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 554. [2022-01-31 17:05:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 547 states have (on average 1.3290676416819014) internal successors, (727), 547 states have internal predecessors, (727), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 734 transitions. [2022-01-31 17:05:21,527 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 734 transitions. Word has length 451 [2022-01-31 17:05:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:21,527 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 734 transitions. [2022-01-31 17:05:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 734 transitions. [2022-01-31 17:05:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-01-31 17:05:21,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:21,529 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:21,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:05:21,530 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 248802120, now seen corresponding path program 90 times [2022-01-31 17:05:21,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:21,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242423105] [2022-01-31 17:05:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:21,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:21,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:21,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:21,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:24,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:24,229 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 17:05:24,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242423105] [2022-01-31 17:05:24,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242423105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:24,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:24,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:05:24,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134055166] [2022-01-31 17:05:24,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:24,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:05:24,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:05:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:05:24,232 INFO L87 Difference]: Start difference. First operand 554 states and 734 transitions. Second operand has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:29,167 INFO L93 Difference]: Finished difference Result 933 states and 1298 transitions. [2022-01-31 17:05:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:05:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 456 [2022-01-31 17:05:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:29,169 INFO L225 Difference]: With dead ends: 933 [2022-01-31 17:05:29,169 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 17:05:29,171 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 17:05:29,172 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3218 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:29,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3218 Valid, 43 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:05:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 17:05:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2022-01-31 17:05:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 553 states have (on average 1.3291139240506329) internal successors, (735), 553 states have internal predecessors, (735), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 742 transitions. [2022-01-31 17:05:29,363 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 742 transitions. Word has length 456 [2022-01-31 17:05:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:29,363 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 742 transitions. [2022-01-31 17:05:29,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 742 transitions. [2022-01-31 17:05:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-01-31 17:05:29,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:29,365 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:05:29,365 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1325848395, now seen corresponding path program 91 times [2022-01-31 17:05:29,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435842114] [2022-01-31 17:05:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:29,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:29,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:29,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:32,101 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 17:05:32,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:32,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435842114] [2022-01-31 17:05:32,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1435842114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:32,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:32,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:05:32,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831104981] [2022-01-31 17:05:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:32,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:05:32,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:05:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:05:32,104 INFO L87 Difference]: Start difference. First operand 560 states and 742 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:36,927 INFO L93 Difference]: Finished difference Result 943 states and 1312 transitions. [2022-01-31 17:05:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:05:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 461 [2022-01-31 17:05:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:36,929 INFO L225 Difference]: With dead ends: 943 [2022-01-31 17:05:36,929 INFO L226 Difference]: Without dead ends: 570 [2022-01-31 17:05:36,931 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 17:05:36,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2248 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:36,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2250 Valid, 63 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-31 17:05:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 566. [2022-01-31 17:05:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 559 states have (on average 1.329159212880143) internal successors, (743), 559 states have internal predecessors, (743), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 750 transitions. [2022-01-31 17:05:37,143 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 750 transitions. Word has length 461 [2022-01-31 17:05:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:37,143 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 750 transitions. [2022-01-31 17:05:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 750 transitions. [2022-01-31 17:05:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 17:05:37,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:37,145 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:37,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:05:37,145 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -367771284, now seen corresponding path program 92 times [2022-01-31 17:05:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311369326] [2022-01-31 17:05:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:37,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:37,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:37,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:37,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:39,952 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 17:05:39,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311369326] [2022-01-31 17:05:39,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311369326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:39,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:39,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:05:39,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033584488] [2022-01-31 17:05:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:39,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:05:39,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:05:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:05:39,955 INFO L87 Difference]: Start difference. First operand 566 states and 750 transitions. Second operand has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:44,930 INFO L93 Difference]: Finished difference Result 953 states and 1326 transitions. [2022-01-31 17:05:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:05:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 466 [2022-01-31 17:05:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:44,932 INFO L225 Difference]: With dead ends: 953 [2022-01-31 17:05:44,932 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 17:05:44,934 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 17:05:44,934 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2445 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2447 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:44,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2447 Valid, 58 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 17:05:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 572. [2022-01-31 17:05:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 565 states have (on average 1.3292035398230089) internal successors, (751), 565 states have internal predecessors, (751), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 758 transitions. [2022-01-31 17:05:45,148 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 758 transitions. Word has length 466 [2022-01-31 17:05:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:45,149 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 758 transitions. [2022-01-31 17:05:45,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 758 transitions. [2022-01-31 17:05:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:05:45,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:45,151 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:05:45,151 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1567007015, now seen corresponding path program 93 times [2022-01-31 17:05:45,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991252351] [2022-01-31 17:05:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:45,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:45,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:45,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:45,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:48,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:48,066 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 17:05:48,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:48,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991252351] [2022-01-31 17:05:48,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991252351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:48,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:48,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:05:48,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166188540] [2022-01-31 17:05:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:48,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:05:48,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:05:48,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:05:48,069 INFO L87 Difference]: Start difference. First operand 572 states and 758 transitions. Second operand has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:53,230 INFO L93 Difference]: Finished difference Result 963 states and 1340 transitions. [2022-01-31 17:05:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:05:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 17:05:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:53,231 INFO L225 Difference]: With dead ends: 963 [2022-01-31 17:05:53,231 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 17:05:53,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:05:53,233 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2292 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:53,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2294 Valid, 58 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:05:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 17:05:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 578. [2022-01-31 17:05:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 571 states have (on average 1.3292469352014011) internal successors, (759), 571 states have internal predecessors, (759), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:05:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 766 transitions. [2022-01-31 17:05:53,449 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 766 transitions. Word has length 471 [2022-01-31 17:05:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:53,449 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 766 transitions. [2022-01-31 17:05:53,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 766 transitions. [2022-01-31 17:05:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-01-31 17:05:53,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:53,451 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:53,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:05:53,451 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -152148080, now seen corresponding path program 94 times [2022-01-31 17:05:53,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:53,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083399465] [2022-01-31 17:05:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:53,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:53,453 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:53,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:53,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:56,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:56,347 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 17:05:56,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:56,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083399465] [2022-01-31 17:05:56,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083399465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:56,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:56,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:05:56,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902542813] [2022-01-31 17:05:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:56,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:05:56,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:05:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:05:56,350 INFO L87 Difference]: Start difference. First operand 578 states and 766 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:01,468 INFO L93 Difference]: Finished difference Result 973 states and 1354 transitions. [2022-01-31 17:06:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:06:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 476 [2022-01-31 17:06:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:01,469 INFO L225 Difference]: With dead ends: 973 [2022-01-31 17:06:01,469 INFO L226 Difference]: Without dead ends: 588 [2022-01-31 17:06:01,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:06:01,471 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2589 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2591 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:01,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2591 Valid, 48 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-31 17:06:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 584. [2022-01-31 17:06:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 577 states have (on average 1.3292894280762566) internal successors, (767), 577 states have internal predecessors, (767), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 774 transitions. [2022-01-31 17:06:01,692 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 774 transitions. Word has length 476 [2022-01-31 17:06:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:01,692 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 774 transitions. [2022-01-31 17:06:01,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 774 transitions. [2022-01-31 17:06:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-01-31 17:06:01,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:01,695 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:01,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:06:01,695 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1756824829, now seen corresponding path program 95 times [2022-01-31 17:06:01,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:01,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616148584] [2022-01-31 17:06:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:01,696 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:01,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:01,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:01,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:04,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616148584] [2022-01-31 17:06:04,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616148584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:04,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:04,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:06:04,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150219417] [2022-01-31 17:06:04,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:06:04,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:06:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:06:04,728 INFO L87 Difference]: Start difference. First operand 584 states and 774 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:10,100 INFO L93 Difference]: Finished difference Result 983 states and 1368 transitions. [2022-01-31 17:06:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:06:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 481 [2022-01-31 17:06:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:10,101 INFO L225 Difference]: With dead ends: 983 [2022-01-31 17:06:10,101 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 17:06:10,103 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 17:06:10,103 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2466 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:10,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2468 Valid, 68 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 17:06:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 590. [2022-01-31 17:06:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 583 states have (on average 1.3293310463121784) internal successors, (775), 583 states have internal predecessors, (775), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 782 transitions. [2022-01-31 17:06:10,330 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 782 transitions. Word has length 481 [2022-01-31 17:06:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 782 transitions. [2022-01-31 17:06:10,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 782 transitions. [2022-01-31 17:06:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 17:06:10,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:10,333 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:10,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:06:10,333 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:10,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:10,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1741233588, now seen corresponding path program 96 times [2022-01-31 17:06:10,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:10,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014934961] [2022-01-31 17:06:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:10,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:10,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:10,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:10,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:13,347 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 17:06:13,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:13,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014934961] [2022-01-31 17:06:13,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014934961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:13,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:13,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:06:13,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378998645] [2022-01-31 17:06:13,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:13,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:06:13,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:06:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:06:13,349 INFO L87 Difference]: Start difference. First operand 590 states and 782 transitions. Second operand has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:18,732 INFO L93 Difference]: Finished difference Result 993 states and 1382 transitions. [2022-01-31 17:06:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:06:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 17:06:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:18,733 INFO L225 Difference]: With dead ends: 993 [2022-01-31 17:06:18,733 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 17:06:18,735 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 17:06:18,735 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2713 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2715 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:18,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2715 Valid, 48 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 17:06:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 596. [2022-01-31 17:06:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 589 states have (on average 1.3293718166383701) internal successors, (783), 589 states have internal predecessors, (783), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 790 transitions. [2022-01-31 17:06:18,964 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 790 transitions. Word has length 486 [2022-01-31 17:06:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:18,964 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 790 transitions. [2022-01-31 17:06:18,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 790 transitions. [2022-01-31 17:06:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:06:18,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:18,967 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:06:18,967 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash -58219297, now seen corresponding path program 97 times [2022-01-31 17:06:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732154731] [2022-01-31 17:06:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:18,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:18,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:18,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:18,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:22,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:22,115 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 17:06:22,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732154731] [2022-01-31 17:06:22,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732154731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:22,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:22,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:06:22,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547719333] [2022-01-31 17:06:22,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:22,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:06:22,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:06:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:06:22,118 INFO L87 Difference]: Start difference. First operand 596 states and 790 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:27,690 INFO L93 Difference]: Finished difference Result 1003 states and 1396 transitions. [2022-01-31 17:06:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:06:27,691 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:06:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:27,692 INFO L225 Difference]: With dead ends: 1003 [2022-01-31 17:06:27,692 INFO L226 Difference]: Without dead ends: 606 [2022-01-31 17:06:27,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:06:27,694 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2940 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2942 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:27,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2942 Valid, 53 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-31 17:06:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 602. [2022-01-31 17:06:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 595 states have (on average 1.3294117647058823) internal successors, (791), 595 states have internal predecessors, (791), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 798 transitions. [2022-01-31 17:06:27,979 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 798 transitions. Word has length 491 [2022-01-31 17:06:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 798 transitions. [2022-01-31 17:06:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 798 transitions. [2022-01-31 17:06:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-01-31 17:06:27,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:27,982 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:27,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:06:27,983 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash -209017896, now seen corresponding path program 98 times [2022-01-31 17:06:27,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789505810] [2022-01-31 17:06:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:27,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:27,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:27,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:27,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,137 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 17:06:31,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:31,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789505810] [2022-01-31 17:06:31,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [789505810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:31,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:31,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:06:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498916941] [2022-01-31 17:06:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:31,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:06:31,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:06:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:06:31,139 INFO L87 Difference]: Start difference. First operand 602 states and 798 transitions. Second operand has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:36,814 INFO L93 Difference]: Finished difference Result 1013 states and 1410 transitions. [2022-01-31 17:06:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:06:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 496 [2022-01-31 17:06:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:36,816 INFO L225 Difference]: With dead ends: 1013 [2022-01-31 17:06:36,816 INFO L226 Difference]: Without dead ends: 612 [2022-01-31 17:06:36,818 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 17:06:36,818 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2907 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2909 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:36,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2909 Valid, 48 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-31 17:06:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 608. [2022-01-31 17:06:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 601 states have (on average 1.3294509151414309) internal successors, (799), 601 states have internal predecessors, (799), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 806 transitions. [2022-01-31 17:06:37,057 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 806 transitions. Word has length 496 [2022-01-31 17:06:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:37,058 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 806 transitions. [2022-01-31 17:06:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 806 transitions. [2022-01-31 17:06:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-01-31 17:06:37,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:37,060 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:37,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:06:37,060 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 914120379, now seen corresponding path program 99 times [2022-01-31 17:06:37,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319598862] [2022-01-31 17:06:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:37,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:37,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:37,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:37,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:40,268 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 17:06:40,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319598862] [2022-01-31 17:06:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [319598862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:40,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:06:40,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713005605] [2022-01-31 17:06:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:06:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:06:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:06:40,271 INFO L87 Difference]: Start difference. First operand 608 states and 806 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:46,153 INFO L93 Difference]: Finished difference Result 1023 states and 1424 transitions. [2022-01-31 17:06:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:06:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 501 [2022-01-31 17:06:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:46,154 INFO L225 Difference]: With dead ends: 1023 [2022-01-31 17:06:46,154 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 17:06:46,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:06:46,156 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3069 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3071 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:46,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3071 Valid, 58 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 17:06:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 614. [2022-01-31 17:06:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 607 states have (on average 1.329489291598023) internal successors, (807), 607 states have internal predecessors, (807), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 814 transitions. [2022-01-31 17:06:46,385 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 814 transitions. Word has length 501 [2022-01-31 17:06:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:46,386 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 814 transitions. [2022-01-31 17:06:46,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 814 transitions. [2022-01-31 17:06:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-01-31 17:06:46,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:46,388 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:46,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:06:46,388 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2040084988, now seen corresponding path program 100 times [2022-01-31 17:06:46,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035941399] [2022-01-31 17:06:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:46,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:46,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:46,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:46,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:49,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035941399] [2022-01-31 17:06:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035941399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:49,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:49,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:06:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022036080] [2022-01-31 17:06:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:06:49,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:06:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:06:49,675 INFO L87 Difference]: Start difference. First operand 614 states and 814 transitions. Second operand has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:55,663 INFO L93 Difference]: Finished difference Result 1033 states and 1438 transitions. [2022-01-31 17:06:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:06:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 506 [2022-01-31 17:06:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:55,664 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 17:06:55,664 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 17:06:55,667 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 17:06:55,667 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2991 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2993 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:55,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2993 Valid, 43 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:06:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 17:06:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 620. [2022-01-31 17:06:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 613 states have (on average 1.32952691680261) internal successors, (815), 613 states have internal predecessors, (815), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:06:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 822 transitions. [2022-01-31 17:06:55,941 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 822 transitions. Word has length 506 [2022-01-31 17:06:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:55,941 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 822 transitions. [2022-01-31 17:06:55,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 822 transitions. [2022-01-31 17:06:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-01-31 17:06:55,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:55,943 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:55,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:06:55,943 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -201267049, now seen corresponding path program 101 times [2022-01-31 17:06:55,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517246740] [2022-01-31 17:06:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:55,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:55,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:55,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:55,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:59,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:59,331 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 17:06:59,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517246740] [2022-01-31 17:06:59,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517246740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:59,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:59,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:06:59,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095183776] [2022-01-31 17:06:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:59,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:06:59,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:06:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:06:59,334 INFO L87 Difference]: Start difference. First operand 620 states and 822 transitions. Second operand has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:05,400 INFO L93 Difference]: Finished difference Result 1043 states and 1452 transitions. [2022-01-31 17:07:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:07:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 511 [2022-01-31 17:07:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:05,401 INFO L225 Difference]: With dead ends: 1043 [2022-01-31 17:07:05,401 INFO L226 Difference]: Without dead ends: 630 [2022-01-31 17:07:05,403 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 17:07:05,403 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2448 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:05,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2450 Valid, 78 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:07:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-31 17:07:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 626. [2022-01-31 17:07:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 619 states have (on average 1.3295638126009692) internal successors, (823), 619 states have internal predecessors, (823), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 830 transitions. [2022-01-31 17:07:05,643 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 830 transitions. Word has length 511 [2022-01-31 17:07:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:05,643 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 830 transitions. [2022-01-31 17:07:05,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 830 transitions. [2022-01-31 17:07:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-01-31 17:07:05,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:05,646 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:05,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:07:05,646 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1512366048, now seen corresponding path program 102 times [2022-01-31 17:07:05,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:05,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897024844] [2022-01-31 17:07:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:05,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:05,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:05,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:05,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:09,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:09,045 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 17:07:09,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:09,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897024844] [2022-01-31 17:07:09,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897024844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:09,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:09,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:07:09,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317430996] [2022-01-31 17:07:09,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:07:09,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:07:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:07:09,048 INFO L87 Difference]: Start difference. First operand 626 states and 830 transitions. Second operand has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:15,233 INFO L93 Difference]: Finished difference Result 1053 states and 1466 transitions. [2022-01-31 17:07:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:07:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 516 [2022-01-31 17:07:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:15,234 INFO L225 Difference]: With dead ends: 1053 [2022-01-31 17:07:15,234 INFO L226 Difference]: Without dead ends: 636 [2022-01-31 17:07:15,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:07:15,236 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2795 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 53 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:07:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-31 17:07:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 632. [2022-01-31 17:07:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 625 states have (on average 1.3296) internal successors, (831), 625 states have internal predecessors, (831), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 838 transitions. [2022-01-31 17:07:15,496 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 838 transitions. Word has length 516 [2022-01-31 17:07:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 838 transitions. [2022-01-31 17:07:15,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 838 transitions. [2022-01-31 17:07:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-01-31 17:07:15,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:15,498 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:15,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:07:15,498 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1164903027, now seen corresponding path program 103 times [2022-01-31 17:07:15,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:15,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992143040] [2022-01-31 17:07:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:15,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:15,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:15,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:15,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:19,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992143040] [2022-01-31 17:07:19,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [992143040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:19,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:19,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:07:19,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141076071] [2022-01-31 17:07:19,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:19,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:07:19,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:07:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:07:19,010 INFO L87 Difference]: Start difference. First operand 632 states and 838 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:25,381 INFO L93 Difference]: Finished difference Result 1063 states and 1480 transitions. [2022-01-31 17:07:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:07:25,381 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 521 [2022-01-31 17:07:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:25,382 INFO L225 Difference]: With dead ends: 1063 [2022-01-31 17:07:25,383 INFO L226 Difference]: Without dead ends: 642 [2022-01-31 17:07:25,384 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 17:07:25,384 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2622 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:25,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 78 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:07:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-31 17:07:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 638. [2022-01-31 17:07:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 631 states have (on average 1.329635499207607) internal successors, (839), 631 states have internal predecessors, (839), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 846 transitions. [2022-01-31 17:07:25,653 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 846 transitions. Word has length 521 [2022-01-31 17:07:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:25,654 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 846 transitions. [2022-01-31 17:07:25,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 846 transitions. [2022-01-31 17:07:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 17:07:25,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:25,656 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:25,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:07:25,656 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1799973308, now seen corresponding path program 104 times [2022-01-31 17:07:25,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448583773] [2022-01-31 17:07:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:25,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:25,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:25,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:25,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:29,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:29,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448583773] [2022-01-31 17:07:29,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448583773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:29,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:29,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:07:29,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530848422] [2022-01-31 17:07:29,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:07:29,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:07:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:07:29,208 INFO L87 Difference]: Start difference. First operand 638 states and 846 transitions. Second operand has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:35,731 INFO L93 Difference]: Finished difference Result 1073 states and 1494 transitions. [2022-01-31 17:07:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:07:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 17:07:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:35,732 INFO L225 Difference]: With dead ends: 1073 [2022-01-31 17:07:35,732 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 17:07:35,734 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 17:07:35,734 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2624 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:35,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 63 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:07:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 17:07:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 644. [2022-01-31 17:07:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 637 states have (on average 1.3296703296703296) internal successors, (847), 637 states have internal predecessors, (847), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 854 transitions. [2022-01-31 17:07:36,005 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 854 transitions. Word has length 526 [2022-01-31 17:07:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:36,005 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 854 transitions. [2022-01-31 17:07:36,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 854 transitions. [2022-01-31 17:07:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:07:36,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:36,007 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:36,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:07:36,007 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -123704241, now seen corresponding path program 105 times [2022-01-31 17:07:36,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772949006] [2022-01-31 17:07:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:36,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:36,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:36,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:36,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:39,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:39,588 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 17:07:39,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772949006] [2022-01-31 17:07:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772949006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:39,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:07:39,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218170285] [2022-01-31 17:07:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:39,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:07:39,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:07:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:07:39,590 INFO L87 Difference]: Start difference. First operand 644 states and 854 transitions. Second operand has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:46,323 INFO L93 Difference]: Finished difference Result 1083 states and 1508 transitions. [2022-01-31 17:07:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:07:46,323 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 17:07:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:46,324 INFO L225 Difference]: With dead ends: 1083 [2022-01-31 17:07:46,324 INFO L226 Difference]: Without dead ends: 654 [2022-01-31 17:07:46,326 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 17:07:46,327 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3006 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3008 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:46,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3008 Valid, 58 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:07:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-31 17:07:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 650. [2022-01-31 17:07:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 643 states have (on average 1.3297045101088647) internal successors, (855), 643 states have internal predecessors, (855), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 862 transitions. [2022-01-31 17:07:46,601 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 862 transitions. Word has length 531 [2022-01-31 17:07:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:46,601 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 862 transitions. [2022-01-31 17:07:46,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 862 transitions. [2022-01-31 17:07:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-01-31 17:07:46,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:46,603 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:46,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:07:46,604 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1997659240, now seen corresponding path program 106 times [2022-01-31 17:07:46,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843513664] [2022-01-31 17:07:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:46,605 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:46,605 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:46,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:46,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,239 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 17:07:50,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:50,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843513664] [2022-01-31 17:07:50,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843513664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:50,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:50,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:07:50,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162282708] [2022-01-31 17:07:50,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:50,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:07:50,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:07:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:07:50,241 INFO L87 Difference]: Start difference. First operand 650 states and 862 transitions. Second operand has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:57,010 INFO L93 Difference]: Finished difference Result 1093 states and 1522 transitions. [2022-01-31 17:07:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:07:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 536 [2022-01-31 17:07:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:57,011 INFO L225 Difference]: With dead ends: 1093 [2022-01-31 17:07:57,011 INFO L226 Difference]: Without dead ends: 660 [2022-01-31 17:07:57,013 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 17:07:57,013 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3033 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3035 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:57,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3035 Valid, 53 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:07:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-31 17:07:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 656. [2022-01-31 17:07:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 649 states have (on average 1.3297380585516179) internal successors, (863), 649 states have internal predecessors, (863), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:07:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 870 transitions. [2022-01-31 17:07:57,292 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 870 transitions. Word has length 536 [2022-01-31 17:07:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:57,292 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 870 transitions. [2022-01-31 17:07:57,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 870 transitions. [2022-01-31 17:07:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-01-31 17:07:57,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:57,295 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:57,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:07:57,295 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -185670101, now seen corresponding path program 107 times [2022-01-31 17:07:57,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:57,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76166496] [2022-01-31 17:07:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:57,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:57,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:57,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:57,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:00,992 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 17:08:00,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76166496] [2022-01-31 17:08:00,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76166496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:00,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:00,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:08:00,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574035556] [2022-01-31 17:08:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:00,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:08:00,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:08:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:08:00,996 INFO L87 Difference]: Start difference. First operand 656 states and 870 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:07,842 INFO L93 Difference]: Finished difference Result 1103 states and 1536 transitions. [2022-01-31 17:08:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:08:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 541 [2022-01-31 17:08:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:07,843 INFO L225 Difference]: With dead ends: 1103 [2022-01-31 17:08:07,843 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 17:08:07,845 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 17:08:07,846 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2785 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:07,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 63 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 17:08:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 662. [2022-01-31 17:08:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 655 states have (on average 1.3297709923664123) internal successors, (871), 655 states have internal predecessors, (871), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:08:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 878 transitions. [2022-01-31 17:08:08,131 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 878 transitions. Word has length 541 [2022-01-31 17:08:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:08,131 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 878 transitions. [2022-01-31 17:08:08,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 878 transitions. [2022-01-31 17:08:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-01-31 17:08:08,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:08,133 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:08,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:08:08,134 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash 911422092, now seen corresponding path program 108 times [2022-01-31 17:08:08,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044233589] [2022-01-31 17:08:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:08,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:08,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:08,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:08,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:11,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:11,930 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 17:08:11,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044233589] [2022-01-31 17:08:11,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044233589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:11,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:11,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:08:11,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831134123] [2022-01-31 17:08:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:11,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:08:11,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:08:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:08:11,933 INFO L87 Difference]: Start difference. First operand 662 states and 878 transitions. Second operand has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:19,004 INFO L93 Difference]: Finished difference Result 1113 states and 1550 transitions. [2022-01-31 17:08:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:08:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 546 [2022-01-31 17:08:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:19,006 INFO L225 Difference]: With dead ends: 1113 [2022-01-31 17:08:19,006 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 17:08:19,008 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 17:08:19,008 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3012 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3014 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3014 Valid, 58 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 17:08:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 668. [2022-01-31 17:08:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 661 states have (on average 1.3298033282904689) internal successors, (879), 661 states have internal predecessors, (879), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:08:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 886 transitions. [2022-01-31 17:08:19,298 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 886 transitions. Word has length 546 [2022-01-31 17:08:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:19,298 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 886 transitions. [2022-01-31 17:08:19,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 886 transitions. [2022-01-31 17:08:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 17:08:19,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:19,300 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:19,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:08:19,300 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1758187513, now seen corresponding path program 109 times [2022-01-31 17:08:19,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:19,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547134611] [2022-01-31 17:08:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:19,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:19,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:19,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:19,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:23,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:23,165 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 17:08:23,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:23,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547134611] [2022-01-31 17:08:23,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547134611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:23,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:23,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:08:23,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459819875] [2022-01-31 17:08:23,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:23,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:08:23,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:08:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:08:23,169 INFO L87 Difference]: Start difference. First operand 668 states and 886 transitions. Second operand has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:30,381 INFO L93 Difference]: Finished difference Result 1123 states and 1564 transitions. [2022-01-31 17:08:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:08:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 17:08:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:30,382 INFO L225 Difference]: With dead ends: 1123 [2022-01-31 17:08:30,382 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 17:08:30,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:08:30,384 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2734 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 58 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 17:08:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2022-01-31 17:08:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 667 states have (on average 1.3298350824587706) internal successors, (887), 667 states have internal predecessors, (887), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:08:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 894 transitions. [2022-01-31 17:08:30,679 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 894 transitions. Word has length 551 [2022-01-31 17:08:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 894 transitions. [2022-01-31 17:08:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 894 transitions. [2022-01-31 17:08:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-01-31 17:08:30,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:30,682 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:08:30,682 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 409000112, now seen corresponding path program 110 times [2022-01-31 17:08:30,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873985070] [2022-01-31 17:08:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:30,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:30,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:30,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:30,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:34,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:34,588 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 17:08:34,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873985070] [2022-01-31 17:08:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873985070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:34,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:08:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15375798] [2022-01-31 17:08:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:08:34,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:34,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:08:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:08:34,591 INFO L87 Difference]: Start difference. First operand 674 states and 894 transitions. Second operand has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:41,989 INFO L93 Difference]: Finished difference Result 1133 states and 1578 transitions. [2022-01-31 17:08:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:08:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 556 [2022-01-31 17:08:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:41,991 INFO L225 Difference]: With dead ends: 1133 [2022-01-31 17:08:41,991 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 17:08:41,993 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 17:08:41,993 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3076 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:41,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 53 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 17:08:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 680. [2022-01-31 17:08:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 673 states have (on average 1.3298662704309063) internal successors, (895), 673 states have internal predecessors, (895), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:08:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 902 transitions. [2022-01-31 17:08:42,293 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 902 transitions. Word has length 556 [2022-01-31 17:08:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:42,293 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 902 transitions. [2022-01-31 17:08:42,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 902 transitions. [2022-01-31 17:08:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-01-31 17:08:42,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:42,296 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:42,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:08:42,296 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 231344611, now seen corresponding path program 111 times [2022-01-31 17:08:42,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169917273] [2022-01-31 17:08:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:42,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:42,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:42,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:42,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:46,266 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 17:08:46,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169917273] [2022-01-31 17:08:46,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169917273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:46,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:46,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:08:46,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272914551] [2022-01-31 17:08:46,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:46,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:08:46,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:08:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:08:46,272 INFO L87 Difference]: Start difference. First operand 680 states and 902 transitions. Second operand has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:53,769 INFO L93 Difference]: Finished difference Result 1143 states and 1592 transitions. [2022-01-31 17:08:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:08:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 561 [2022-01-31 17:08:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:53,771 INFO L225 Difference]: With dead ends: 1143 [2022-01-31 17:08:53,771 INFO L226 Difference]: Without dead ends: 690 [2022-01-31 17:08:53,773 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 17:08:53,773 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2673 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2675 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:53,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2675 Valid, 63 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:08:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-31 17:08:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 686. [2022-01-31 17:08:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 679 states have (on average 1.3298969072164948) internal successors, (903), 679 states have internal predecessors, (903), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:08:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 910 transitions. [2022-01-31 17:08:54,079 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 910 transitions. Word has length 561 [2022-01-31 17:08:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:54,079 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 910 transitions. [2022-01-31 17:08:54,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 910 transitions. [2022-01-31 17:08:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 17:08:54,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:54,082 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:08:54,082 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1671499476, now seen corresponding path program 112 times [2022-01-31 17:08:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:54,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064975902] [2022-01-31 17:08:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:54,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:54,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:54,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:54,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:58,117 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 17:08:58,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064975902] [2022-01-31 17:08:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064975902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:58,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:58,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:08:58,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045759361] [2022-01-31 17:08:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:58,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:08:58,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:08:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:08:58,121 INFO L87 Difference]: Start difference. First operand 686 states and 910 transitions. Second operand has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:05,712 INFO L93 Difference]: Finished difference Result 1153 states and 1606 transitions. [2022-01-31 17:09:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:09:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 566 [2022-01-31 17:09:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:05,714 INFO L225 Difference]: With dead ends: 1153 [2022-01-31 17:09:05,714 INFO L226 Difference]: Without dead ends: 696 [2022-01-31 17:09:05,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:09:05,716 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4115 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4117 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:05,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4117 Valid, 43 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:09:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-31 17:09:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 692. [2022-01-31 17:09:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 685 states have (on average 1.3299270072992702) internal successors, (911), 685 states have internal predecessors, (911), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:09:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 918 transitions. [2022-01-31 17:09:06,027 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 918 transitions. Word has length 566 [2022-01-31 17:09:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 918 transitions. [2022-01-31 17:09:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 918 transitions. [2022-01-31 17:09:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 17:09:06,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:06,030 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:09:06,030 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:06,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1266011201, now seen corresponding path program 113 times [2022-01-31 17:09:06,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:06,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227940316] [2022-01-31 17:09:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:06,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:06,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:06,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:10,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:10,233 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 17:09:10,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:10,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227940316] [2022-01-31 17:09:10,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227940316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:10,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:10,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:09:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287012662] [2022-01-31 17:09:10,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:10,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:09:10,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:09:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:09:10,236 INFO L87 Difference]: Start difference. First operand 692 states and 918 transitions. Second operand has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:19,224 INFO L93 Difference]: Finished difference Result 1163 states and 1620 transitions. [2022-01-31 17:09:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:09:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 571 [2022-01-31 17:09:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:19,226 INFO L225 Difference]: With dead ends: 1163 [2022-01-31 17:09:19,226 INFO L226 Difference]: Without dead ends: 702 [2022-01-31 17:09:19,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:09:19,231 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2652 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2654 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:19,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2654 Valid, 63 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:09:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-31 17:09:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 698. [2022-01-31 17:09:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 691 states have (on average 1.329956584659913) internal successors, (919), 691 states have internal predecessors, (919), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:09:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 926 transitions. [2022-01-31 17:09:19,679 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 926 transitions. Word has length 571 [2022-01-31 17:09:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:19,679 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 926 transitions. [2022-01-31 17:09:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 926 transitions. [2022-01-31 17:09:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-01-31 17:09:19,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:19,683 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:09:19,683 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 49943800, now seen corresponding path program 114 times [2022-01-31 17:09:19,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:19,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878564512] [2022-01-31 17:09:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:19,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:19,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:19,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:19,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:24,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:24,618 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 17:09:24,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:24,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878564512] [2022-01-31 17:09:24,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878564512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:24,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:24,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:09:24,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268399396] [2022-01-31 17:09:24,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:24,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:09:24,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:09:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:09:24,622 INFO L87 Difference]: Start difference. First operand 698 states and 926 transitions. Second operand has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:32,607 INFO L93 Difference]: Finished difference Result 1173 states and 1634 transitions. [2022-01-31 17:09:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:09:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 576 [2022-01-31 17:09:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:32,608 INFO L225 Difference]: With dead ends: 1173 [2022-01-31 17:09:32,608 INFO L226 Difference]: Without dead ends: 708 [2022-01-31 17:09:32,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:09:32,612 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3151 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3151 Valid, 58 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:09:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-01-31 17:09:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 704. [2022-01-31 17:09:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 697 states have (on average 1.3299856527977045) internal successors, (927), 697 states have internal predecessors, (927), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:09:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 934 transitions. [2022-01-31 17:09:32,940 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 934 transitions. Word has length 576 [2022-01-31 17:09:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 934 transitions. [2022-01-31 17:09:32,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 934 transitions. [2022-01-31 17:09:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-01-31 17:09:32,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:32,943 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:32,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:09:32,943 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1892576667, now seen corresponding path program 115 times [2022-01-31 17:09:32,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555281654] [2022-01-31 17:09:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:32,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:32,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:32,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:32,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:37,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:37,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555281654] [2022-01-31 17:09:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [555281654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:37,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:37,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:09:37,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52619254] [2022-01-31 17:09:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:09:37,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:09:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:09:37,215 INFO L87 Difference]: Start difference. First operand 704 states and 934 transitions. Second operand has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:45,374 INFO L93 Difference]: Finished difference Result 1183 states and 1648 transitions. [2022-01-31 17:09:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:09:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 581 [2022-01-31 17:09:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:45,376 INFO L225 Difference]: With dead ends: 1183 [2022-01-31 17:09:45,376 INFO L226 Difference]: Without dead ends: 714 [2022-01-31 17:09:45,378 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 17:09:45,378 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3026 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:45,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3028 Valid, 63 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:09:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-31 17:09:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 710. [2022-01-31 17:09:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 703 states have (on average 1.330014224751067) internal successors, (935), 703 states have internal predecessors, (935), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:09:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 942 transitions. [2022-01-31 17:09:45,706 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 942 transitions. Word has length 581 [2022-01-31 17:09:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:45,706 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 942 transitions. [2022-01-31 17:09:45,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 942 transitions. [2022-01-31 17:09:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 17:09:45,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:45,708 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:45,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:09:45,709 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash 701639452, now seen corresponding path program 116 times [2022-01-31 17:09:45,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:45,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515218731] [2022-01-31 17:09:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:45,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:45,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:45,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:45,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:50,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:50,365 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 17:09:50,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515218731] [2022-01-31 17:09:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515218731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:50,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:50,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:09:50,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169198615] [2022-01-31 17:09:50,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:50,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:09:50,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:09:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:09:50,368 INFO L87 Difference]: Start difference. First operand 710 states and 942 transitions. Second operand has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:58,990 INFO L93 Difference]: Finished difference Result 1193 states and 1662 transitions. [2022-01-31 17:09:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:09:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-01-31 17:09:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:58,992 INFO L225 Difference]: With dead ends: 1193 [2022-01-31 17:09:58,992 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 17:09:58,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:09:58,996 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:58,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3105 Valid, 78 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:09:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 17:09:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 716. [2022-01-31 17:09:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 709 states have (on average 1.3300423131170662) internal successors, (943), 709 states have internal predecessors, (943), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:09:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 950 transitions. [2022-01-31 17:09:59,403 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 950 transitions. Word has length 586 [2022-01-31 17:09:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:59,403 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 950 transitions. [2022-01-31 17:09:59,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 950 transitions. [2022-01-31 17:09:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 17:09:59,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:59,406 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:59,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:09:59,406 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 225474423, now seen corresponding path program 117 times [2022-01-31 17:09:59,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:59,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913051225] [2022-01-31 17:09:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:59,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:59,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:59,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:59,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:03,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:03,875 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 17:10:03,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913051225] [2022-01-31 17:10:03,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [913051225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:03,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:03,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:10:03,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042377961] [2022-01-31 17:10:03,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:03,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:10:03,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:10:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:10:03,880 INFO L87 Difference]: Start difference. First operand 716 states and 950 transitions. Second operand has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:12,818 INFO L93 Difference]: Finished difference Result 1203 states and 1676 transitions. [2022-01-31 17:10:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:10:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 17:10:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:12,820 INFO L225 Difference]: With dead ends: 1203 [2022-01-31 17:10:12,820 INFO L226 Difference]: Without dead ends: 726 [2022-01-31 17:10:12,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:10:12,824 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2990 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2992 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:12,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2992 Valid, 63 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:10:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-01-31 17:10:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 722. [2022-01-31 17:10:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 715 states have (on average 1.3300699300699301) internal successors, (951), 715 states have internal predecessors, (951), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:10:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 958 transitions. [2022-01-31 17:10:13,340 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 958 transitions. Word has length 591 [2022-01-31 17:10:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:13,356 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 958 transitions. [2022-01-31 17:10:13,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 958 transitions. [2022-01-31 17:10:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-01-31 17:10:13,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:13,359 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:13,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:10:13,360 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -133197504, now seen corresponding path program 118 times [2022-01-31 17:10:13,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816678355] [2022-01-31 17:10:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:13,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:13,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:13,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:13,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:18,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:18,152 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 17:10:18,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816678355] [2022-01-31 17:10:18,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816678355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:18,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:18,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:10:18,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281084472] [2022-01-31 17:10:18,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:18,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:10:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:10:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:10:18,156 INFO L87 Difference]: Start difference. First operand 722 states and 958 transitions. Second operand has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:26,897 INFO L93 Difference]: Finished difference Result 1213 states and 1690 transitions. [2022-01-31 17:10:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:10:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 596 [2022-01-31 17:10:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:26,898 INFO L225 Difference]: With dead ends: 1213 [2022-01-31 17:10:26,899 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 17:10:26,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:10:26,901 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:26,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3449 Valid, 58 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:10:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 17:10:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 728. [2022-01-31 17:10:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 721 states have (on average 1.3300970873786409) internal successors, (959), 721 states have internal predecessors, (959), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:10:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 966 transitions. [2022-01-31 17:10:27,245 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 966 transitions. Word has length 596 [2022-01-31 17:10:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:27,246 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 966 transitions. [2022-01-31 17:10:27,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 966 transitions. [2022-01-31 17:10:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-01-31 17:10:27,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:27,248 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:27,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:10:27,249 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1765142189, now seen corresponding path program 119 times [2022-01-31 17:10:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296992081] [2022-01-31 17:10:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:27,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:27,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:27,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:27,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:31,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:31,940 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 17:10:31,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296992081] [2022-01-31 17:10:31,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296992081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:31,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:31,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:10:31,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379403000] [2022-01-31 17:10:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:31,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:10:31,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:10:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:10:31,943 INFO L87 Difference]: Start difference. First operand 728 states and 966 transitions. Second operand has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:42,123 INFO L93 Difference]: Finished difference Result 1223 states and 1704 transitions. [2022-01-31 17:10:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:10:42,124 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 601 [2022-01-31 17:10:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:42,125 INFO L225 Difference]: With dead ends: 1223 [2022-01-31 17:10:42,125 INFO L226 Difference]: Without dead ends: 738 [2022-01-31 17:10:42,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:10:42,127 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4159 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4161 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:42,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4161 Valid, 48 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:10:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-31 17:10:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 734. [2022-01-31 17:10:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 727 states have (on average 1.330123796423659) internal successors, (967), 727 states have internal predecessors, (967), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:10:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 974 transitions. [2022-01-31 17:10:42,484 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 974 transitions. Word has length 601 [2022-01-31 17:10:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:42,484 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 974 transitions. [2022-01-31 17:10:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 974 transitions. [2022-01-31 17:10:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 17:10:42,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:42,487 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:10:42,487 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash 504924004, now seen corresponding path program 120 times [2022-01-31 17:10:42,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196982003] [2022-01-31 17:10:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:42,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:42,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:42,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:42,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:47,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:47,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196982003] [2022-01-31 17:10:47,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196982003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:47,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:47,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:10:47,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634760439] [2022-01-31 17:10:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:47,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:10:47,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:47,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:10:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:10:47,136 INFO L87 Difference]: Start difference. First operand 734 states and 974 transitions. Second operand has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:56,091 INFO L93 Difference]: Finished difference Result 1233 states and 1718 transitions. [2022-01-31 17:10:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:10:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 606 [2022-01-31 17:10:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:56,092 INFO L225 Difference]: With dead ends: 1233 [2022-01-31 17:10:56,092 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 17:10:56,095 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 17:10:56,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3601 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3603 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:56,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3603 Valid, 58 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:10:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 17:10:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 740. [2022-01-31 17:10:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 733 states have (on average 1.330150068212824) internal successors, (975), 733 states have internal predecessors, (975), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:10:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 982 transitions. [2022-01-31 17:10:56,451 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 982 transitions. Word has length 606 [2022-01-31 17:10:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 982 transitions. [2022-01-31 17:10:56,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 982 transitions. [2022-01-31 17:10:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-01-31 17:10:56,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:56,454 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:10:56,454 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1229653201, now seen corresponding path program 121 times [2022-01-31 17:10:56,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:56,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268507003] [2022-01-31 17:10:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:56,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:56,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:56,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:01,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268507003] [2022-01-31 17:11:01,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268507003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:01,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:01,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:11:01,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900653876] [2022-01-31 17:11:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:11:01,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:11:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:11:01,230 INFO L87 Difference]: Start difference. First operand 740 states and 982 transitions. Second operand has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:10,515 INFO L93 Difference]: Finished difference Result 1243 states and 1732 transitions. [2022-01-31 17:11:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:11:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 611 [2022-01-31 17:11:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:10,517 INFO L225 Difference]: With dead ends: 1243 [2022-01-31 17:11:10,517 INFO L226 Difference]: Without dead ends: 750 [2022-01-31 17:11:10,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:11:10,521 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3588 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3590 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:10,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3590 Valid, 43 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:11:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-31 17:11:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 746. [2022-01-31 17:11:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 739 states have (on average 1.3301759133964817) internal successors, (983), 739 states have internal predecessors, (983), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:11:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 990 transitions. [2022-01-31 17:11:10,997 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 990 transitions. Word has length 611 [2022-01-31 17:11:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:10,998 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 990 transitions. [2022-01-31 17:11:10,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 990 transitions. [2022-01-31 17:11:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-01-31 17:11:11,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:11,001 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:11,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:11:11,001 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2133635704, now seen corresponding path program 122 times [2022-01-31 17:11:11,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236178172] [2022-01-31 17:11:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:11,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:11,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:11,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:11,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:15,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:15,765 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 17:11:15,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236178172] [2022-01-31 17:11:15,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236178172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:15,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:15,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:11:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123296897] [2022-01-31 17:11:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:15,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:11:15,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:11:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:11:15,768 INFO L87 Difference]: Start difference. First operand 746 states and 990 transitions. Second operand has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:25,064 INFO L93 Difference]: Finished difference Result 1253 states and 1746 transitions. [2022-01-31 17:11:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:11:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 616 [2022-01-31 17:11:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:25,065 INFO L225 Difference]: With dead ends: 1253 [2022-01-31 17:11:25,065 INFO L226 Difference]: Without dead ends: 756 [2022-01-31 17:11:25,068 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 17:11:25,068 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3305 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3307 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:25,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3307 Valid, 58 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:11:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-31 17:11:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2022-01-31 17:11:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 745 states have (on average 1.3302013422818793) internal successors, (991), 745 states have internal predecessors, (991), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:11:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 998 transitions. [2022-01-31 17:11:25,438 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 998 transitions. Word has length 616 [2022-01-31 17:11:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:25,438 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 998 transitions. [2022-01-31 17:11:25,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 998 transitions. [2022-01-31 17:11:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-01-31 17:11:25,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:25,441 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:25,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:11:25,441 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash 277542155, now seen corresponding path program 123 times [2022-01-31 17:11:25,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:25,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868947274] [2022-01-31 17:11:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:25,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:25,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:25,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:25,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:30,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:30,344 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 17:11:30,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868947274] [2022-01-31 17:11:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868947274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:30,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:30,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:11:30,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629019757] [2022-01-31 17:11:30,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:30,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:11:30,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:11:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:11:30,348 INFO L87 Difference]: Start difference. First operand 752 states and 998 transitions. Second operand has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:40,000 INFO L93 Difference]: Finished difference Result 1263 states and 1760 transitions. [2022-01-31 17:11:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:11:40,000 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-01-31 17:11:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:40,002 INFO L225 Difference]: With dead ends: 1263 [2022-01-31 17:11:40,002 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 17:11:40,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:11:40,005 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3452 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:40,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3454 Valid, 68 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:11:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 17:11:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 758. [2022-01-31 17:11:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 751 states have (on average 1.3302263648468708) internal successors, (999), 751 states have internal predecessors, (999), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:11:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1006 transitions. [2022-01-31 17:11:40,378 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1006 transitions. Word has length 621 [2022-01-31 17:11:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1006 transitions. [2022-01-31 17:11:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1006 transitions. [2022-01-31 17:11:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-01-31 17:11:40,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:40,394 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:40,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:11:40,394 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:40,394 INFO L85 PathProgramCache]: Analyzing trace with hash -576314452, now seen corresponding path program 124 times [2022-01-31 17:11:40,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:40,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966542191] [2022-01-31 17:11:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:40,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:40,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:40,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:40,404 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,335 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 17:11:45,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966542191] [2022-01-31 17:11:45,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966542191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:45,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:45,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:11:45,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905782395] [2022-01-31 17:11:45,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:45,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:11:45,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:11:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:11:45,340 INFO L87 Difference]: Start difference. First operand 758 states and 1006 transitions. Second operand has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:54,841 INFO L93 Difference]: Finished difference Result 1273 states and 1774 transitions. [2022-01-31 17:11:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:11:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 626 [2022-01-31 17:11:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:54,843 INFO L225 Difference]: With dead ends: 1273 [2022-01-31 17:11:54,843 INFO L226 Difference]: Without dead ends: 768 [2022-01-31 17:11:54,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:11:54,846 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3719 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:54,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3721 Valid, 53 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:11:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-31 17:11:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 764. [2022-01-31 17:11:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 757 states have (on average 1.3302509907529723) internal successors, (1007), 757 states have internal predecessors, (1007), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:11:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1014 transitions. [2022-01-31 17:11:55,229 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1014 transitions. Word has length 626 [2022-01-31 17:11:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:55,229 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1014 transitions. [2022-01-31 17:11:55,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1014 transitions. [2022-01-31 17:11:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-01-31 17:11:55,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:55,232 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:55,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:11:55,232 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1658470681, now seen corresponding path program 125 times [2022-01-31 17:11:55,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:55,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400839149] [2022-01-31 17:11:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:55,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:55,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:55,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:55,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:00,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:00,293 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 17:12:00,293 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400839149] [2022-01-31 17:12:00,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400839149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:00,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:00,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:12:00,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179885107] [2022-01-31 17:12:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:00,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:12:00,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:12:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:12:00,298 INFO L87 Difference]: Start difference. First operand 764 states and 1014 transitions. Second operand has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:10,149 INFO L93 Difference]: Finished difference Result 1283 states and 1788 transitions. [2022-01-31 17:12:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:12:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 631 [2022-01-31 17:12:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:10,151 INFO L225 Difference]: With dead ends: 1283 [2022-01-31 17:12:10,151 INFO L226 Difference]: Without dead ends: 774 [2022-01-31 17:12:10,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:12:10,155 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3571 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:10,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3573 Valid, 73 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:12:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-31 17:12:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 770. [2022-01-31 17:12:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 763 states have (on average 1.3302752293577982) internal successors, (1015), 763 states have internal predecessors, (1015), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:12:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1022 transitions. [2022-01-31 17:12:10,659 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1022 transitions. Word has length 631 [2022-01-31 17:12:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1022 transitions. [2022-01-31 17:12:10,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1022 transitions. [2022-01-31 17:12:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2022-01-31 17:12:10,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:10,663 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:10,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:12:10,663 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1853311440, now seen corresponding path program 126 times [2022-01-31 17:12:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:10,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407411562] [2022-01-31 17:12:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:10,664 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:10,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:10,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:10,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:15,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407411562] [2022-01-31 17:12:15,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [407411562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:15,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:15,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:12:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448991833] [2022-01-31 17:12:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:15,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:12:15,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:12:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:12:15,709 INFO L87 Difference]: Start difference. First operand 770 states and 1022 transitions. Second operand has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:25,675 INFO L93 Difference]: Finished difference Result 1293 states and 1802 transitions. [2022-01-31 17:12:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:12:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 636 [2022-01-31 17:12:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:25,676 INFO L225 Difference]: With dead ends: 1293 [2022-01-31 17:12:25,676 INFO L226 Difference]: Without dead ends: 780 [2022-01-31 17:12:25,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:12:25,679 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 3473 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:25,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 58 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:12:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-31 17:12:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 776. [2022-01-31 17:12:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 769 states have (on average 1.330299089726918) internal successors, (1023), 769 states have internal predecessors, (1023), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:12:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1030 transitions. [2022-01-31 17:12:26,071 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1030 transitions. Word has length 636 [2022-01-31 17:12:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:26,071 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1030 transitions. [2022-01-31 17:12:26,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1030 transitions. [2022-01-31 17:12:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-01-31 17:12:26,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:26,074 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:26,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:12:26,074 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 115284163, now seen corresponding path program 127 times [2022-01-31 17:12:26,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477067696] [2022-01-31 17:12:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:26,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:26,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:26,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:26,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat